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Date: Thu, 31 Aug 2006 18:58:44 -0600
From: "M. David Peterson" <xmlhacker@gmail.com>
To: "atom-syntax Syntax" <atom-syntax@imc.org>
Subject: Re: Can/Does/Should the FeedValidator catch improperly escaped XHTML?
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Both points well taken.

I would like to change my initial vote to -1, though +1 for both James and
Aristotle's follow-up.

On 8/31/06, A. Pagaltzis <pagaltzis@gmx.de> wrote:
>
>
> * James Holderness <j4_james@hotmail.com> [2006-09-01 01:30]:
> > Encouraging people to use xhtml when they don't know enough to
> > have made that decision themselves is just asking for trouble.
>
> +1
>
> Regards,
> --
> Aristotle Pagaltzis // <http://plasmasturm.org/>
>
>


-- 
/M:D

M. David Peterson
http://mdavid.name | http://www.oreillynet.com/pub/au/2354

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Both points well taken.<br><br>I would like to change my initial vote to -1, though +1 for both James and Aristotle's follow-up.<br><br><div><span class="gmail_quote">On 8/31/06, <b class="gmail_sendername">A. Pagaltzis</b>
 &lt;<a href="mailto:pagaltzis@gmx.de">pagaltzis@gmx.de</a>&gt; wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br>* James Holderness &lt;
<a href="mailto:j4_james@hotmail.com">j4_james@hotmail.com</a>&gt; [2006-09-01 01:30]:<br>&gt; Encouraging people to use xhtml when they don't know enough to<br>&gt; have made that decision themselves is just asking for trouble.
<br><br>+1<br><br>Regards,<br>--<br>Aristotle Pagaltzis // &lt;<a href="http://plasmasturm.org/">http://plasmasturm.org/</a>&gt;<br><br></blockquote></div><br><br clear="all"><br>-- <br>/M:D<br><br>M. David Peterson<br><a href="http://mdavid.name">
http://mdavid.name</a> | <a href="http://www.oreillynet.com/pub/au/2354">http://www.oreillynet.com/pub/au/2354</a>

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Date: Sat, 02 Sep 2006 12:23:51 +0200
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Subject: Re: Can/Does/Should the FeedValidator catch improperly escaped XHTML?
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On Fri, 01 Sep 2006 01:19:35 +0200, James Holderness =20
<j4_james@hotmail.com> wrote:

> Just because a feed appears to contain well-formed xhtml content today,=
 =20
> that doesn't mean it's going to be well-formed tomorrow. Encouraging =20
> people to use xhtml when they don't know enough to have made that =20
> decision themselves is just asking for trouble. Sooner or later they're=
 =20
> going to end up with broken xml which will be completely unreadable in =
=20
> many aggregators.

Well, that completely depends on how we present this information to the =20
user. I was not thinking of a simple message saying "This is valid XHTML,=
 =20
change @type to 'xhtml' ASAP, you newb!", but more along the lines of =20
informing the user that the content looks like wellformed XHTML, that he =
=20
can read more about it here and there, why he should try to keep it =20
wellformed and why he should not change it if he's not sure of its =20
welformedness.

Something like that.

> Also, escaped html tends to be better supported by aggregators anyway.

That's today. I would hope and assume that this changes in the future.

--=20
Asbj=F8rn Ulsberg     -=3D|=3D-    http://virtuelvis.com/quark/
=ABHe's a loathsome offensive brute, yet I can't look away=BB




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Date: Mon, 04 Sep 2006 12:02:21 -0700
From: James M Snell <jasnell@gmail.com>
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I'm currently looking for other Atom implementations that support the
option to digitally sign feeds and entries.  Apache Abdera supports
digital signatures and encryption and I'd like to do some interop
testing against other impls.

- James




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Subject: RE: XML Digital Signatures in Atom feeds and entries
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James,

There is an interop service for Atom 1.0 feed/entry signature 
validation available (with source code for both service and 
Wordpress plugin) as part of the Signed Ping initiative at 
  http://signedping.com

Let me know if you need more info.
-Hans 

> -----Original Message-----
> From: owner-atom-syntax@mail.imc.org 
> [mailto:owner-atom-syntax@mail.imc.org] On Behalf Of James M Snell
> Sent: Monday, September 04, 2006 12:02 PM
> To: atom-syntax
> Subject: XML Digital Signatures in Atom feeds and entries
> 
> 
> I'm currently looking for other Atom implementations that 
> support the option to digitally sign feeds and entries.  
> Apache Abdera supports digital signatures and encryption and 
> I'd like to do some interop testing against other impls.
> 
> - James
> 
> 
> 




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Hello Thomas,

Thank you for taking the time to review the draft.  I have cc'd this
response to the atom-syntax list so that others in the Atom community
can comment.

Comments below.

Thomas Roessler wrote:
> Hi Mike, James, pleased to meet you.
> 
> I'm adding Wendy Seltzer to the CC list, who (I think) might have
> some points to add from a legal perspective.
> 
> Here's the quick review that I did earlier today:
> 
>> - What's the relationship between licensing information contained in
>>  a license-type link and licensing information contained in an
>>  atom:rights element?
> 
> (For the definition of atom:rights, see section 4.2.10 of RFC 4287.)
> 
>>  The example under 2.1 in the I-D suggests that the atom:rights is
>>  expected to reflect the license that is identified in the link
>>  element.  However, there seems to be no machine-readable way to
>>  express that connection.
>>  
>>  Also, there can be multiple license links, but only one rights
>>  element.
>>

This is the third time I've been asked this.  I guess I really do need
to add a clear statement about the relationship in the spec.  With
enough thumps on the head I usually come around ;-)

The relationship is relatively simple.  The atom:rights element is
always a human-readable statement of what rights are held over the feed
or entry.  It's is the equivalent of saying "Copyright (c) James Snell"
and cannot be relied upon to tell the consumer anything useful about
what the consumer can do with the feed or entry.  The license link, on
the other hand, is specifically intended to provide a reference to the
license applied to the feed/entry; that is, what kinds of things others
are allowed do with the feed/entry.

>> - An atom:rights element on a feed sets the default for the
>>  atom:rights elements on entries; a license link on a feed,
>>  however, is expected to apply to the metadata and NOT to the
>>  entries.
>>
>>  Why the difference in inheritance rules and semantics?

This is something that I've debated back and forth on but the difference
comes down to an issue with aggregated feeds.

Take, for instance, Sam Ruby's Planet feed
(http://planet.intertwingly.net/atom.xml).  This feed consists of
entries that originated from many different sources, some of which may
have license links, some that might not.  If Sam decided to put a
license link at the feed level, and if license links were inherited, it
would mean that Sam's license would be extended over resources he may
have no right to license.  Obviously, that's wrong.

One two possible solution would be for Sam to some how indicate that an
entry in his feed did not have a license link, but doing so could cause
other problems (such as invalidating any XML digital signatures that may
be covering the entry).  Also, it's possible that the entry originally
came from a feed that did include a license link, but that some
intermediary along the way failed to properly carry over the license
link into the entry after separating it from the feed.  The bottom line
is that license inheritance opens too many potentially significant
issues. (and yes, these issues apply equally to the atom:rights element).

The simple solution, then, is to specify that license links only cover
the feed or entry containing the link.

>>
>> - It's probably worth noting that there are jurisdictions in which
>>  databases enjoy sui generis legal protection (e.g., the EU).  In
>>  such jurisdictions, it might be reasonable to have license
>>  information that refers to the collection, not just to its
>>  metadata.
>>

The selection and arrangement of entries in the feed is covered by feeds
license.

>> - The following statement:
>>
>>    Entry content might include or reference material from other
>>    sources. Licenses associated with an entry MUST NOT be assumed
>>    to cover such material.  Implementations cannot necessarily
>>    trust that publishers have the right to license material claimed
>>    to be covered by any associated license.  Care should be taken
>>    when making decisions based on the referenced license.
>>
>>  ... takes all of the value out of this scheme.  The very point of
>>  annotating content (even aggregate content) with a license is that
>>  this license be trusted.
> 
> (I understand this to be, in part, a legal layman's overstatement;
> I'll leave it to the lawyers to comment. ;)
> 

Yes, I don't like this either.  But the fact remains that an entries
content may include content from other sources that cannot be assumed to
be covered by the license associated with the entry.  The analogous
situation occurs in Open Source Software distributions in which
dependencies shipped with a project may have their own licenses that are
distinct from the license used for the project code itself.

The question really is whether or not this is worth calling out
explicitly in the spec.

>> Summary: The relationship to atom:rigts should be cleaned up.  The
>> questions above about what precisely a license applies to probably
>> points at a problem in terms of expressivity of the linking scheme
>> -- an argument could be made that there should be machine-readable
>> ways to express what precisely a license link is supposed to apply
>> to. Something like rel={content-license, dataset-license,
>> entry-default-license}?
> 
>> Overall, this document looks like it is in dire need of serious
>> review from legal experts -- e.g., from the Creative Commons
>> community.  

That would be excellent.

> 
> I, too, would be happy to move this discussion to a public mailing
> list.  Is the atompub list the right place to have this
> conversation, or should this go to the IETF plenary, as this draft
> is in IETF Last Call?
> 

The atom-syntax list would be an appropriate forum.

- James




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Hey Mike,

Thanks for taking another look.  Comments below.

Mike Linksvayer wrote:
> Hi James,
> 
> The atom license extension was brought to my attention again.  I'm not
> sure what concerns Thomas Roessler (cc'd) has below (I've also cc'd Lisa
> Dusseault as she mentioned the extension to me recently and appears to
> be involved in the process), but upon re-reading the draft I have one.
> I obviously did not read very carefully in the past and must apologize
> for that.
> 
> In any case, the draft says the referenced license only applies to feed
> or entry metadata, not content.  This strikes me as not particularly
> useful and does not match analogous extentions for RSS 1.0 and RSS 2.0:
> 

The difference in semantics is precisely why I'm not using either the
RSS 1.0 or RSS 2.0 extensions for this as I see problems with both the
former approaches.

> http://web.resource.org/rss/1.0/modules/cc/ is RDF, so it is as clear as
> it can be what license annotations apply to, and in the examples they
> apply to the content at the feed (channel) URL (the feed itself) and the
> content at individual entry URLs (content of individual posts).
> 

It is helpful to take a look at the RSS 1.0 rdf:license definition.

From http://web.resource.org/rss/1.0/modules/cc/:

<!-- start -->
  This module aims to give metadata regarding the copyright license
  under which the RSS feed, and the objects it points to, are released
  under.

  [snip]

  <cc:license rdf:resource="URI OF LICENSE" />

  <cc:license rdf:resource=""> can be a sub-element of an RSS item,
  channel or image. The license it refers to is applied to the parent
  element. As with any RDF elements, an occurance of <cc:license> within
  any element implies the copyright of the document contained with the
  rdf:about attribute of that parent element, and not the document
  pointed to by the <link> sub-element.

  The element contains a single rdf:resource attribute which contains
  the URI of the license applied.
<!-- end -->

From this description, and the example that is illustrated in
specification of the rdf:license module, it is evident to me, at least,
that rss 1.0 channels and items are licensed independently from one
another and that an item does not inherit the license of the channel,
otherwise, you could end up with significant problems if two feeds
referenced the same content item with two difference licenses, e.g.

  <rdf:RDF>
    <channel rdf:about="http://example.org/feed1">
      <cc:license rdf:resource="http://example.org/license1" />
      <items>
        <rdf:Seq>
          <rdf:li resource="http://blog.example.com/2006/08/foo" />
        </rdf:Seq>
      </items>
    </channel>
    <item rdf:about="http://blog.example.com/2006/08/foo">
      ...
    </item>
  </rdf:RDF>

  <rdf:RDF>
    <channel rdf:about="http://example.org/feed2">
      <cc:license rdf:resource="http://example.org/license2" />
      <items>
        <rdf:Seq>
          <rdf:li resource="http://blog.example.com/2006/08/foo" />
        </rdf:Seq>
      </items>
    </channel>
    <item rdf:about="http://blog.example.com/2006/08/foo">
      ...
    </item>
  </rdf:RDF>

Because of RDF's data model and the definition of mod_cc, if licenses
are inherited by the items, these two feeds are either making
contradictory claims about the licensing of a single resource, neither
or which the channel publishers may actually have the right to license,
or they are claiming that the resource has been dual-licensed.
Unfortunately, neither claim can be substantiated by looking at the item
itself.

Note that, because of the RDFs data model, the same problem occurs if
the items in each of the above channels each contain their own
contradictory cc:license links.

Further, there is also the problem that the channel element is
describing a different resource that the item element.  The definition
of cc:license says that the license applies to the parent element and
therefore the resource being described by the parent element.  It is not
specified whether or not that license applies to other resources linked
to the channel.

Also, there is a bug in the spec that, in certain situations causes the
spec to contradict itself.  Consider the sentence: "an occurance of
<cc:license> within any element implies the copyright of the document
contained with the rdf:about attribute of that parent element, and not
the document pointed to by the <link> sub-element" then look at the
example given in the spec itself.

  <item rdf:about="http://c.moreover.com/click/here.pl?r123">
    <title>XML: A Disruptive Technology</title>
    <link>http://c.moreover.com/click/here.pl?r123</link>
    <cc:license rdf:resource="..." />
  </item>

The link and the rdf:about attribute point to exactly the same resource,
making the assertion in the spec self-contradictory.


> http://backend.userland.com/creativeCommonsRssModule says license
> annotations apply to the "content of the RSS file" and "content of that
> item", mirroring the RSS 1.0 use.
> 

I do not believe that the RSS 2.0 definition mirrors the RSS 1.0 use.
I've already noted the problems with inherited licenses when
resyndicating entries in aggregated feeds.

> My first thought is that it would be well worth reconsidering the
> semantics of the atom license extension.  My second thought is that you
> must be well aware of the analogous RSS 1.0 and RSS 2.0 modules and did
> not follow their example for a reason.
> 
> I'd appreciate any thoughts you might have on the matter.  If there is a
> public or private list this should be taken to please let me know.
> 
> Mike
> 
> p.s. There is also a problem in non-RDF formats in determining whether
> resources included in entry content (e.g., images) or enclosures are
> licensed.  The mediaRSS module for RSS 2.0 http://search.yahoo.com/mrss
> seems to assume entry license annotations apply to "media" content.
> This is of course messy and probably beyond the scope of the discussion
> above and below.
> 

Linked resources are *not* covered by license links.

- James

> 
> 
>> On Tue, 2006-09-05 at 10:53 -0400, Ben Adida wrote:
>>> Hey all,
>>>
>>> I'm currently busy moving stuff from one office to another, but I have a
>>> feeling this heads-up from Thomas Roessler is worth looking at urgently,
>>> both with tech and legal eyes.
>>>
>>> -Ben
>>>
>>> -------- Original Message --------
>>> Subject: Heads-up: IETF considering license links for ATOM feeds
>>> Date: Tue, 5 Sep 2006 16:10:06 +0200
>>> From: Thomas Roessler <tlr@w3.org>
>>> To: ben@mit.edu
>>> CC: tlr@w3.org
>>>
>>> Hi Ben,
>>>
>>> FYI, the IETF is considering license links for ATOM feeds.
>>>
>>> You might wish to point your colleagues at Creative Commons at this:
>>>
>>>
>>> http://www.ietf.org/internet-drafts/draft-snell-atompub-feed-license-08.txt
>>>
>>> https://datatracker.ietf.org/public/pidtracker.cgi?command=view_id&dTag=13576&rfc_flag=0
>>>
>>> I understand the draft is in last call until 11 September.
>>>
>>> Reviewing the document, I've stumbled over a number of red flags
>>> (mostly in terms of legal meaning), to the point of possibly being
>>> harmful.
>>>
>>> Regards,




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Subject: Re: atom license extension (Re: [cc-tab] *important* heads up)
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Hello Wendy,

Thanks for the feedback.  I've cc'd the atom-syntax list so the rest of
the Atom community can comment.

Comments below.

Wendy Seltzer wrote:
> Hi all,
> So my first thoughts upon seeing the draft are to wonder why it's
> necessary to make assertions about the legal effects of including a
> license -- especially since some of those assertions seem to obviate the
> purpose of using a license declaration.   While it's helpful to tell
> people how to indicate, technically, what they mean for a license to
> attach to, it's not useful to offer guidance on how to interpret the
> license.
> 
> Namely:
> 
> 1.1   It must also be noted that licenses associated with feeds or entries
>    using these mechanisms are advisory and are not, by themselves,
>    legally binding.  Nor can a license associated with a feed or entry
>    restrict or forbid access to, redistribution, aggregation, caching
>    and display of those items by third party intermediaries such as
>    search engines and so-called "online aggregators".
> 
> Why can't they be legally binding?  They're not self-executing, but
> licenses outside of feeds aren't either, and likewise may or may not be
> legally binding depending upon other things than just the form of their
> expression.
> 

To this point I've received exactly the opposite feedback from others
(all of whom weren't lawyers, btw, but who have had experience with
licensing issues in the past).

It is my understanding that the licenses cannot be considered legally
binding *by themselves*.  That is, precisely as you indicate, they are
not self-executing.

> 
> 2   "License" link relations appearing within a feed MUST apply to the
>    metadata of the containing feed element only and do not extend over
>    the metadata or content of any contained entries.
> 
> Why? Why would a feed need a license separate from its content?  Lots of
> the metadata elements would be functional or would give users fair use
> claims, absent a license.
> 

Sam Ruby's planet feed is a prime example.  Sam does not own rights over
the individual entries that appear within his feed, however, Sam does
own the rights over the feed itself, including the selection and
arrangement of entries within that feed.

I've mentioned before that it's roughly equivalent to distributing
dependencies with an open source project.  Each of the dependencies have
their own license, distinct from the projects license.

>    Entry content might include or reference material from other sources.
>    Licenses associated with an entry MUST NOT be assumed to cover such
>    material.  Implementations cannot necessarily trust that publishers
>    have the right to license material claimed to be covered by any
>    associated license.  Care should be taken when making decisions based
>    on the referenced license.
> 
> This seems to be going down a road of legal interpretation that's
> unnecessary and not necessarily correct. The current CC licenses are
> offered on a "taker beware" basis -- the licensor offers the rights he
> has, and doesn't guarantee a licensee's rights (or even his own) to
> anything he might have incorporated.  That's not the only way to write a
> license, though.  (Even within CC, version 1 had an explicit
> representation and warranty section that was dropped in v.2.)
> 
> Implementations should trust the legal representations only as much or
> as little as they trust any other claim made by the feed.  How licenses
> chain is a matter of individual legal interpretation.
> 

Ok, so if I'm interpreting this comment correctly, the recommendation
would be to simply remove the paragraph in question?

> 
> Forgive me (but please clarify!) if I'm misinterpreting some of the draft.
> 
> Thanks,
> --Wendy
> 

Thanks for taking the time to review,

- James




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Subject: Re: atom license extension (Re: [cc-tab] *important* heads up)
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At 04:08 PM 9/5/2006 -0700, James M Snell wrote:
>Hello Wendy,
>
>Thanks for the feedback.  I've cc'd the atom-syntax list so the rest of
>the Atom community can comment.

Thanks James,
I'm still not clear on what's happening in 1.1.

 > 1.1   It must also be noted that licenses associated with feeds or entries
> >    using these mechanisms are advisory and are not, by themselves,
> >    legally binding.  Nor can a license associated with a feed or entry
> >    restrict or forbid access to, redistribution, aggregation, caching
> >    and display of those items by third party intermediaries such as
> >    search engines and so-called "online aggregators".
> >
> > Why can't they be legally binding?  They're not self-executing, but
> > licenses outside of feeds aren't either, and likewise may or may not be
> > legally binding depending upon other things than just the form of their
> > expression.
>
>To this point I've received exactly the opposite feedback from others
>(all of whom weren't lawyers, btw, but who have had experience with
>licensing issues in the past).
>
>It is my understanding that the licenses cannot be considered legally
>binding *by themselves*.  That is, precisely as you indicate, they are
>not self-executing.

What I meant by that is that they don't actively restrict 
non-compliant use, as a technological protection measure does: I can 
receive a feed and choose to breach its license.   They can have 
legal effect, though:  Unless I have some legal excuse such as fair 
use, I'm then not compliant and possibly infringing copyright.  (You 
still have to come after me for copyright infringement.)

Are you trying to say that the license-rel in the feed is merely a 
notification to those who are curious that "this is probably (but 
we're not certain) the license under which the feed may be used" 
?  That's the way it reads.  If so, what's the point?  Don't you 
either want to assert "take the feed under this license or not at 
all" or say nothing and make people come to you and ask?

I'd recommend dropping this paragraph, as it may give incorrect legal advice.

> > 2   "License" link relations appearing within a feed MUST apply to the
> >    metadata of the containing feed element only and do not extend over
> >    the metadata or content of any contained entries.
> >
> > Why? Why would a feed need a license separate from its content?  Lots of
> > the metadata elements would be functional or would give users fair use
> > claims, absent a license.
> >
>Sam Ruby's planet feed is a prime example.  Sam does not own rights over
>the individual entries that appear within his feed, however, Sam does
>own the rights over the feed itself, including the selection and
>arrangement of entries within that feed.

That seems minimally useful to me (the license, not Sam's feed!), but 
why prohibit people from licensing their feeds' content too? Or am I 
just misreading this, and you're saying that depending on where you 
put the tag, the license's coverage differs?

> >    Entry content might include or reference material from other sources.
> >    Licenses associated with an entry MUST NOT be assumed to cover such
> >    material.  Implementations cannot necessarily trust that publishers
> >    have the right to license material claimed to be covered by any
> >    associated license.  Care should be taken when making decisions based
> >    on the referenced license.
> >
> > This seems to be going down a road of legal interpretation that's
> > unnecessary and not necessarily correct. The current CC licenses are
> > offered on a "taker beware" basis -- the licensor offers the rights he
> > has, and doesn't guarantee a licensee's rights (or even his own) to
> > anything he might have incorporated.  That's not the only way to write a
> > license, though.  (Even within CC, version 1 had an explicit
> > representation and warranty section that was dropped in v.2.)
> >
> > Implementations should trust the legal representations only as much or
> > as little as they trust any other claim made by the feed.  How licenses
> > chain is a matter of individual legal interpretation.
> >
>
>Ok, so if I'm interpreting this comment correctly, the recommendation
>would be to simply remove the paragraph in question?

Yes.

Thanks,
--Wendy


-- 
Wendy Seltzer -- wendy@seltzer.com
Visiting Assistant Professor of Law, Brooklyn Law School
Fellow, Berkman Center for Internet & Society
http://cyber.law.harvard.edu/seltzer.html
Chilling Effects: http://www.chillingeffects.org




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Comments below.

Wendy Seltzer wrote:
> [snip]
> Thanks James,
> I'm still not clear on what's happening in 1.1.
>
> [snip]
>>
>> To this point I've received exactly the opposite feedback from others
>> (all of whom weren't lawyers, btw, but who have had experience with
>> licensing issues in the past).
>>
>> It is my understanding that the licenses cannot be considered legally
>> binding *by themselves*.  That is, precisely as you indicate, they are
>> not self-executing.
> 
> What I meant by that is that they don't actively restrict non-compliant
> use, as a technological protection measure does: I can receive a feed
> and choose to breach its license.   They can have legal effect, though: 
> Unless I have some legal excuse such as fair use, I'm then not compliant
> and possibly infringing copyright.  (You still have to come after me for
> copyright infringement.)
> 
> Are you trying to say that the license-rel in the feed is merely a
> notification to those who are curious that "this is probably (but we're
> not certain) the license under which the feed may be used" ?  That's the
> way it reads.  If so, what's the point?  Don't you either want to assert
> "take the feed under this license or not at all" or say nothing and make
> people come to you and ask?
> 

What I'm saying is that feed consumers have no guarantee as to who added
the license link to the feed/entry and whether whoever did had the legal
right to do so.  Nor is there any guarantee that license links within a
feed or entry have not been inappropriately modified. Feed publishers
can digitally sign Atom feeds and entries to provide some
non-repudiation protection, but doing so is optional and is not a
guaranteed solution.

> I'd recommend dropping this paragraph, as it may give incorrect legal
> advice.
> 

Ok.

>> > 2   "License" link relations appearing within a feed MUST apply to the
>> >    metadata of the containing feed element only and do not extend over
>> >    the metadata or content of any contained entries.
>> >
>> > Why? Why would a feed need a license separate from its content? 
>> Lots of
>> > the metadata elements would be functional or would give users fair use
>> > claims, absent a license.
>> >
>> Sam Ruby's planet feed is a prime example.  Sam does not own rights over
>> the individual entries that appear within his feed, however, Sam does
>> own the rights over the feed itself, including the selection and
>> arrangement of entries within that feed.
> 
> That seems minimally useful to me (the license, not Sam's feed!), but
> why prohibit people from licensing their feeds' content too? Or am I
> just misreading this, and you're saying that depending on where you put
> the tag, the license's coverage differs?
> 

It's the latter.  The license's coverage differs depending on where it
appears.

>[snip]

- James




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Date: Tue, 05 Sep 2006 17:50:20 -0700
From: James M Snell <jasnell@gmail.com>
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To: "Granqvist, Hans" <hgranqvist@verisign.com>
CC: atom-syntax <atom-syntax@imc.org>
Subject: Re: XML Digital Signatures in Atom feeds and entries
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Thanks Hans,

I've tested Abdera's implementation against the endpoint and the signed
entries validate just fine.  Thanks for having that endpoint up and
running.

For what it's worth, here is how to send a signed ping using Abdera:

  // Initialize the keystore
  KeyStore ks = KeyStore.getInstance(keystoreType);
  InputStream in = Listing11.class.getResourceAsStream(keystoreFile);
  ks.load(in, keystorePass.toCharArray());
  PrivateKey signingKey =
    (PrivateKey) ks.getKey(
      privateKeyAlias,
      privateKeyPass.toCharArray());
  X509Certificate cert =
    (X509Certificate) ks.getCertificate(
      certificateAlias);

  // Create the entry to sign
  Abdera abdera = new Abdera();
  AbderaSecurity absec = new AbderaSecurity(abdera);
  Factory factory = abdera.getFactory();

  Entry entry = factory.newEntry();
  entry.setId("http://example.org/foo/entry");
  entry.setUpdated(new java.util.Date());
  entry.setTitle("This is an entry");
  entry.setContentAsXhtml("This <b>is</b> <i>markup</i>");
  entry.addAuthor("James");
  entry.addLink("http://www.example.org");

  // Prepare the digital signature options
  Signature sig = absec.getSignature();
  SignatureOptions options = sig.getDefaultSignatureOptions();
  options.setCertificate(cert);
  options.setSigningKey(signingKey);

  // Sign the entry
  entry = sig.sign(entry, options);

  // Send the ping
  Client client = new CommonsClient();
  RequestOptions opts = client.getDefaultRequestOptions();
  opts.setContentType("application/xml");
  BaseRequestEntity bre = new BaseRequestEntity(entry,false);
  ClientResponse response = client.post(
    "http://verisignlabs.com/tg/verify", bre, opts);
  if (response.getStatus() == 200) {
    Document<Element> result = response.getDocument();
    writer.writeTo(result, System.out);
  }

- James

Granqvist, Hans wrote:
> James,
> 
> There is an interop service for Atom 1.0 feed/entry signature 
> validation available (with source code for both service and 
> Wordpress plugin) as part of the Signed Ping initiative at 
>   http://signedping.com
> 
> Let me know if you need more info.
> -Hans 
> 
>> -----Original Message-----
>> From: owner-atom-syntax@mail.imc.org 
>> [mailto:owner-atom-syntax@mail.imc.org] On Behalf Of James M Snell
>> Sent: Monday, September 04, 2006 12:02 PM
>> To: atom-syntax
>> Subject: XML Digital Signatures in Atom feeds and entries
>>
>>
>> I'm currently looking for other Atom implementations that 
>> support the option to digitally sign feeds and entries.  
>> Apache Abdera supports digital signatures and encryption and 
>> I'd like to do some interop testing against other impls.
>>
>> - James
>>
>>
>>
> 




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Subject: atom liense extension (was Re: [cc-tab] *important* heads up)
From: Mike Linksvayer <ml@creativecommons.org>
To: James M Snell <jasnell@gmail.com>
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        Lisa Dusseault <lisa@osafoundation.org>,
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On Tue, 2006-09-05 at 15:53 -0700, James M Snell wrote:
> Mike Linksvayer wrote:
> > In any case, the draft says the referenced license only applies to feed
> > or entry metadata, not content.  This strikes me as not particularly
> > useful and does not match analogous extentions for RSS 1.0 and RSS 2.0:
>
> The difference in semantics is precisely why I'm not using either the
> RSS 1.0 or RSS 2.0 extensions for this as I see problems with both the
> former approaches.

I understand having problems with RSS 1.0 and RSS 2.0 approaches but I
don't see an inherent and important difference in semantics,
particularly between Atom 1.0 and RSS 2.0.  Of course my vision is
probably foggy. :)

> > http://web.resource.org/rss/1.0/modules/cc/ is RDF, so it is as clear as
> > it can be what license annotations apply to, and in the examples they
> > apply to the content at the feed (channel) URL (the feed itself) and the
> > content at individual entry URLs (content of individual posts). 
> 
> It is helpful to take a look at the RSS 1.0 rdf:license definition.
> 
> >From http://web.resource.org/rss/1.0/modules/cc/:
> 
> <!-- start -->
>   This module aims to give metadata regarding the copyright license
>   under which the RSS feed, and the objects it points to, are released
>   under.
> 
>   [snip]
> 
>   <cc:license rdf:resource="URI OF LICENSE" />
> 
>   <cc:license rdf:resource=""> can be a sub-element of an RSS item,
>   channel or image. The license it refers to is applied to the parent
>   element. As with any RDF elements, an occurance of <cc:license> within
>   any element implies the copyright of the document contained with the
>   rdf:about attribute of that parent element, and not the document
>   pointed to by the <link> sub-element.
> 
>   The element contains a single rdf:resource attribute which contains
>   the URI of the license applied.
> <!-- end -->
> 
> >From this description, and the example that is illustrated in
> specification of the rdf:license module, it is evident to me, at least,
> that rss 1.0 channels and items are licensed independently from one
> another and that an item does not inherit the license of the channel,
> otherwise, you could end up with significant problems if two feeds
> referenced the same content item with two difference licenses, e.g.
> 
>   <rdf:RDF>
>     <channel rdf:about="http://example.org/feed1">
>       <cc:license rdf:resource="http://example.org/license1" />
>       <items>
>         <rdf:Seq>
>           <rdf:li resource="http://blog.example.com/2006/08/foo" />
>         </rdf:Seq>
>       </items>
>     </channel>
>     <item rdf:about="http://blog.example.com/2006/08/foo">
>       ...
>     </item>
>   </rdf:RDF>
> 
>   <rdf:RDF>
>     <channel rdf:about="http://example.org/feed2">
>       <cc:license rdf:resource="http://example.org/license2" />
>       <items>
>         <rdf:Seq>
>           <rdf:li resource="http://blog.example.com/2006/08/foo" />
>         </rdf:Seq>
>       </items>
>     </channel>
>     <item rdf:about="http://blog.example.com/2006/08/foo">
>       ...
>     </item>
>   </rdf:RDF>
> 
> Because of RDF's data model and the definition of mod_cc, if licenses
> are inherited by the items, these two feeds are either making
> contradictory claims about the licensing of a single resource, neither
> or which the channel publishers may actually have the right to license,
> or they are claiming that the resource has been dual-licensed.
> Unfortunately, neither claim can be substantiated by looking at the item
> itself.
> 
> Note that, because of the RDFs data model, the same problem occurs if
> the items in each of the above channels each contain their own
> contradictory cc:license links.
> 
> Further, there is also the problem that the channel element is
> describing a different resource that the item element.  The definition
> of cc:license says that the license applies to the parent element and
> therefore the resource being described by the parent element.  It is not
> specified whether or not that license applies to other resources linked
> to the channel.

The subject of the channel is the feed itself, which necessarily
includes any content delivered with the feed, including the full or
excerpted text of individual items, if delivered with the feed itself.
It is only in this sense that a feed level statement applies to item
content -- when the content is part of the feed.

> Also, there is a bug in the spec that, in certain situations causes the
> spec to contradict itself.  Consider the sentence: "an occurance of
> <cc:license> within any element implies the copyright of the document
> contained with the rdf:about attribute of that parent element, and not
> the document pointed to by the <link> sub-element" then look at the
> example given in the spec itself.
> 
>   <item rdf:about="http://c.moreover.com/click/here.pl?r123">
>     <title>XML: A Disruptive Technology</title>
>     <link>http://c.moreover.com/click/here.pl?r123</link>
>     <cc:license rdf:resource="..." />
>   </item>
> 
> The link and the rdf:about attribute point to exactly the same resource,
> making the assertion in the spec self-contradictory.

The example could be more illustrative but it is hardly contradictory.
AFAICT the item subject (specified by rdf:about) and the link property
usually are the same, indeed the spec
http://web.resource.org/rss/1.0/spec#s5.5 says they "should be
identical ... if possible."  I have no idea why the link property of an
item even exists in RSS 1.0, but that's neither here nor there.

> > http://backend.userland.com/creativeCommonsRssModule says license
> > annotations apply to the "content of the RSS file" and "content of that
> > item", mirroring the RSS 1.0 use.
> > 
> 
> I do not believe that the RSS 2.0 definition mirrors the RSS 1.0 use.

They look as close as they could be to me, given different models (URIs
for feeds and items vs. "content of" feeds and items).  Effectively they
mean the same things.

> I've already noted the problems with inherited licenses when
> resyndicating entries in aggregated feeds.

I agree that assuming entries inherit licenses specified at a feed level
is problematic.  My concern, at the feed and entry level, is that the
atom license extension draft says that a link relation can (only) be
used to associate a license with feed or entry metadata, rather than
content.  Unlike other children of <feed> and <entry> the license
extension is not metadata for the feed or entry but metametadata for the
feed or entry metadata, which strikes me as not particularly useful and
contrary to both RSS 1.0 and RSS 2.0 modules, whatever differences exist
between those.

-- 
  http://wiki.creativecommons.org/User:Mike_Linksvayer




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From: James M Snell <jasnell@gmail.com>
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        Lisa Dusseault <lisa@osafoundation.org>,
        atom-syntax <atom-syntax@imc.org>
Subject: Re: atom liense extension (was Re: [cc-tab] *important* heads up)
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Mike Linksvayer wrote:
> On Tue, 2006-09-05 at 15:53 -0700, James M Snell wrote:
>> Mike Linksvayer wrote:
>>> In any case, the draft says the referenced license only applies to feed
>>> or entry metadata, not content.  This strikes me as not particularly
>>> useful and does not match analogous extentions for RSS 1.0 and RSS 2.0:
>> The difference in semantics is precisely why I'm not using either the
>> RSS 1.0 or RSS 2.0 extensions for this as I see problems with both the
>> former approaches.
> 
> I understand having problems with RSS 1.0 and RSS 2.0 approaches but I
> don't see an inherent and important difference in semantics,
> particularly between Atom 1.0 and RSS 2.0.  Of course my vision is
> probably foggy. :)
> 

The difference boils down to one very simple point: contained resources
do not necessarily inherit the license of the container.  The RSS 1.0
and RSS 2.0 modules both assume that the rights holder of the channel
also holds rights over all of the contained items, which works fine when
I'm publishing my own blogs entries in my own feed, but breaks down when
I'm republishing entries from multiple sources.

>[snip]
(I'm still stewing over the bit of comments that I snipped out of this
:-) ...)

> I agree that assuming entries inherit licenses specified at a feed level
> is problematic.  My concern, at the feed and entry level, is that the
> atom license extension draft says that a link relation can (only) be
> used to associate a license with feed or entry metadata, rather than
> content.  Unlike other children of <feed> and <entry> the license
> extension is not metadata for the feed or entry but metametadata for the
> feed or entry metadata, which strikes me as not particularly useful and
> contrary to both RSS 1.0 and RSS 2.0 modules, whatever differences exist
> between those.
> 

My apologies if I haven't been clear on this.  If you look again at
section 1.3, you should find the following:

   For entry elements, "metadata" refers to the values and attributes of
   the author, category, content, contributor, id, link, published,
   rights, source, summary, title, and updated elements, as well as all
   extension elements appearing as children of the entry element and all
   elements appearing as children of the author and contributor
   elements.

Note that the value and attributes of the content, summary, title, etc
elements are all included in entry "metadata".  What isn't covered are
any linked resources.  So any content actually appearing within the
entry is covered by the entry license.

(Note that paragaph 4 of section two will be removed in the next
iteration per Wendy's suggestion)

- James




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Subject: Re: atom liense extension (was Re: [cc-tab] *important* heads up)
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This is a multi-part message in MIME format.
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James M Snell wrote:

>
>Mike Linksvayer wrote:
>  
>
>>On Tue, 2006-09-05 at 15:53 -0700, James M Snell wrote:
>>    
>>
>>>Mike Linksvayer wrote:
>>>      
>>>
>>>>In any case, the draft says the referenced license only applies to feed
>>>>or entry metadata, not content.  This strikes me as not particularly
>>>>useful and does not match analogous extentions for RSS 1.0 and RSS 2.0:
>>>>        
>>>>
>>>The difference in semantics is precisely why I'm not using either the
>>>RSS 1.0 or RSS 2.0 extensions for this as I see problems with both the
>>>former approaches.
>>>      
>>>
>>I understand having problems with RSS 1.0 and RSS 2.0 approaches but I
>>don't see an inherent and important difference in semantics,
>>particularly between Atom 1.0 and RSS 2.0.  Of course my vision is
>>probably foggy. :)
>>
>>    
>>
>
>The difference boils down to one very simple point: contained resources
>do not necessarily inherit the license of the container.  The RSS 1.0
>and RSS 2.0 modules both assume that the rights holder of the channel
>also holds rights over all of the contained items, which works fine when
>I'm publishing my own blogs entries in my own feed, but breaks down when
>I'm republishing entries from multiple sources.
>  
>
Here's my rationale:  Atom has explicit support in the core RFC 4287 
syntax  for 'synthetic' feeds containing entries from multiple sources 
produced by multiple authors with different copyrights.  RSS 2.0 doesn't 
have this core support.  So in the case of Atom, the issue is a bit more 
urgent.  So tackling the Atom case first makes sense to me.

(Aside: Is there any reason why an Atom extension couldn't also be used 
as an RSS 2.0 extension too?  In this case, there would be a valid 
reason to add to the already crowded space of license extensions:  
Because it lets you specify the feed license terms separately from the 
individual entry license terms, whereas the other RSS licensing schemes 
don't.)

>  
>
>>[snip]
>>    
>>
>(I'm still stewing over the bit of comments that I snipped out of this
>:-) ...)
>
>  
>
>>I agree that assuming entries inherit licenses specified at a feed level
>>is problematic.  My concern, at the feed and entry level, is that the
>>atom license extension draft says that a link relation can (only) be
>>used to associate a license with feed or entry metadata, rather than
>>content.  Unlike other children of <feed> and <entry> the license
>>extension is not metadata for the feed or entry but metametadata for the
>>feed or entry metadata, which strikes me as not particularly useful and
>>contrary to both RSS 1.0 and RSS 2.0 modules, whatever differences exist
>>between those.
>>
>>    
>>
>
>My apologies if I haven't been clear on this.  If you look again at
>section 1.3, you should find the following:
>
>   For entry elements, "metadata" refers to the values and attributes of
>   the author, category, content, contributor, id, link, published,
>   rights, source, summary, title, and updated elements, as well as all
>   extension elements appearing as children of the entry element and all
>   elements appearing as children of the author and contributor
>   elements.
>
>Note that the value and attributes of the content, summary, title, etc
>elements are all included in entry "metadata".  What isn't covered are
>any linked resources.  So any content actually appearing within the
>entry is covered by the entry license.
>  
>
(Is it just me, or is there too much overloading of "metadata" here?)

Also, does this mean that an entry license would apply to this content:

    <content type="image/gif">TWFuIGlzIGRpc3Rpbmd1aXNoZWQsIG</content>

but not to the same content communicated through an indirect link?

    <content type="image/gif" src="http://example.org/catpicture001.gif"/>

(I'm deliberately picking a GIF picture as I believe there's no good 
solution for embedding license metadata inside GIFs.  )

-John Panzer


--------------000505090601080306090201
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
  <meta content=3D"text/html;charset=3DUTF-8" http-equiv=3D"Content-Type"=
>
  <title></title>
</head>
<body bgcolor=3D"#ffffff" text=3D"#000000">
James M Snell wrote:
<blockquote cite=3D"mid44FE4599.4030707@gmail.com" type=3D"cite">
  <pre wrap=3D"">

Mike Linksvayer wrote:
  </pre>
  <blockquote type=3D"cite">
    <pre wrap=3D"">On Tue, 2006-09-05 at 15:53 -0700, James M Snell wrote=
:
    </pre>
    <blockquote type=3D"cite">
      <pre wrap=3D"">Mike Linksvayer wrote:
      </pre>
      <blockquote type=3D"cite">
        <pre wrap=3D"">In any case, the draft says the referenced license=
 only applies to feed
or entry metadata, not content.  This strikes me as not particularly
useful and does not match analogous extentions for RSS 1.0 and RSS 2.0:
        </pre>
      </blockquote>
      <pre wrap=3D"">The difference in semantics is precisely why I'm not=
 using either the
RSS 1.0 or RSS 2.0 extensions for this as I see problems with both the
former approaches.
      </pre>
    </blockquote>
    <pre wrap=3D"">I understand having problems with RSS 1.0 and RSS 2.0 =
approaches but I
don't see an inherent and important difference in semantics,
particularly between Atom 1.0 and RSS 2.0.  Of course my vision is
probably foggy. :)

    </pre>
  </blockquote>
  <pre wrap=3D""><!---->
The difference boils down to one very simple point: contained resources
do not necessarily inherit the license of the container.  The RSS 1.0
and RSS 2.0 modules both assume that the rights holder of the channel
also holds rights over all of the contained items, which works fine when
I'm publishing my own blogs entries in my own feed, but breaks down when
I'm republishing entries from multiple sources.
  </pre>
</blockquote>
Here's my rationale:=C2=A0 Atom has explicit support in the core RFC 4287
syntax=C2=A0 for 'synthetic' feeds containing entries from multiple sourc=
es
produced by multiple authors with different copyrights.=C2=A0 RSS 2.0
doesn't have this core support.=C2=A0 So in the case of Atom, the issue i=
s a
bit more urgent.=C2=A0 So tackling the Atom case first makes sense to me.=
<br>
<br>
(Aside: Is there any reason why an Atom extension couldn't also be used
as an RSS 2.0 extension too?=C2=A0 In this case, there would be a valid
reason to add to the already crowded space of license extensions:=C2=A0
Because it lets you specify the feed license terms separately from the
individual entry license terms, whereas the other RSS licensing schemes
don't.)<br>
<br>
<blockquote cite=3D"mid44FE4599.4030707@gmail.com" type=3D"cite">
  <pre wrap=3D"">
  </pre>
  <blockquote type=3D"cite">
    <pre wrap=3D"">[snip]
    </pre>
  </blockquote>
  <pre wrap=3D""><!---->(I'm still stewing over the bit of comments that =
I snipped out of this
:-) ...)

  </pre>
  <blockquote type=3D"cite">
    <pre wrap=3D"">I agree that assuming entries inherit licenses specifi=
ed at a feed level
is problematic.  My concern, at the feed and entry level, is that the
atom license extension draft says that a link relation can (only) be
used to associate a license with feed or entry metadata, rather than
content.  Unlike other children of &lt;feed&gt; and &lt;entry&gt; the lic=
ense
extension is not metadata for the feed or entry but metametadata for the
feed or entry metadata, which strikes me as not particularly useful and
contrary to both RSS 1.0 and RSS 2.0 modules, whatever differences exist
between those.

    </pre>
  </blockquote>
  <pre wrap=3D""><!---->
My apologies if I haven't been clear on this.  If you look again at
section 1.3, you should find the following:

   For entry elements, "metadata" refers to the values and attributes of
   the author, category, content, contributor, id, link, published,
   rights, source, summary, title, and updated elements, as well as all
   extension elements appearing as children of the entry element and all
   elements appearing as children of the author and contributor
   elements.

Note that the value and attributes of the content, summary, title, etc
elements are all included in entry "metadata".  What isn't covered are
any linked resources.  So any content actually appearing within the
entry is covered by the entry license.
  </pre>
</blockquote>
(Is it just me, or is there too much overloading of "metadata" here?)<br>
<br>
Also, does this mean that an entry license would apply to this content:<b=
r>
<br>
=C2=A0=C2=A0=C2=A0 &lt;content
type=3D"image/gif"&gt;TWFuIGlzIGRpc3Rpbmd1aXNoZWQsIG&lt;/content&gt;<br>
<br>
but not to the same content communicated through an indirect link?<br>
<br>
=C2=A0=C2=A0=C2=A0 &lt;content type=3D"image/gif"
src=3D<a class=3D"moz-txt-link-rfc2396E" href=3D"http://example.org/catpi=
cture001.gif">"http://example.org/catpicture001.gif"</a>/&gt;<br>
<br>
(I'm deliberately picking a GIF picture as I believe there's no good
solution for embedding license metadata inside GIFs.=C2=A0 )<br>
<br>
-John Panzer<br>
<br>
</body>
</html>

--------------000505090601080306090201--




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Subject: Re: atom liense extension (was Re: [cc-tab] *important* heads up)
References: <44FD8F55.2010609@mit.edu>	 <1157478767.18377.47.camel@localhost.localdomain>	 <1157482144.18377.75.camel@localhost.localdomain>	 <44FDFFDE.7060304@gmail.com> <1157508255.18377.171.camel@localhost.localdomain> <44FE4599.4030707@gmail.com> <44FE5683.1030509@aol.net>
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Yes, that's what it means, which I'll definitely admit is odd.  I think
there is a massive gray area here that needs to be worked out.  I'm not
sure how to work it out.

- James

John Panzer wrote:
>[snip]
> (Is it just me, or is there too much overloading of "metadata" here?)
> 
> Also, does this mean that an entry license would apply to this content:
> 
>     <content type="image/gif">TWFuIGlzIGRpc3Rpbmd1aXNoZWQsIG</content>
> 
> but not to the same content communicated through an indirect link?
> 
>     <content type="image/gif" src="http://example.org/catpicture001.gif"/>
> 
> (I'm deliberately picking a GIF picture as I believe there's no good
> solution for embedding license metadata inside GIFs.  )
> 
> -John Panzer
> 




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Subject: RE: atom license extension (Re: [cc-tab] *important* heads up)
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Wendy Seltzer wrote:
> I'm still not clear on what's happening in 1.1.
>> 1.1  It must also be noted that licenses associated with
>> feeds or entries using these mechanisms are advisory and
>> are not, by themselves, legally binding.  
	Section 1.1 contains two sentences that are, I think, at least in
part the result of a telephone conversation on this subject that James and I
had about a week ago. However, I think that James has written both sentences
too strongly and it is quite possible the first sentence is unnecessary.
I'll explain the logic behind my reasoning. First, the first sentence and
the second, later.
	The first sentence is concerned with the binding between the feed or
entry and the actual license. For one to rely on a license, either as a
rights holder or as a grantee, you need to be able to show what the license
actually said at the time that you relied upon it.
	Because of the nature of the tool being used here, a hyperlink, we
must accept that the binding between content and license is a weak and
fragile one. There is no guarantee that the content of the license
associated with a feed at one instance will be the same as it is at some
other instance. Also, there is no mechanism provided to ensure that claims
made about what the license was at one instance can be proved at a later
time. This weakness of the link is going to make it very difficult for
either a copyright holder or one who relies on a license found in a license
link to rely on being able to make definitive statements about what the
license content actually was. Certainly, there are special cases. For
instance, those who link to Creative Commons licenses using the appropriate
and presumably well managed URLs that Creative Commons provides are going to
be able to much more certain when making assertions about license content
since these licenses are only modified in very public and dated events.
However, Creative Commons is a special case and can't be generalized to all
possible licenses. Thus, while we might find that links to Creative Commons
licenses (and others which are similarly well managed) might be effective,
it is likely that links to at least some other licenses would not be
considered effective. Thus, it might be better to word the sentence
conditionally. Something like: "licenses associated with feeds or entries
using these mechanisms may not be legally binding"...
	My personal feeling is that given the customs of the net today, it
is likely that the most common licenses referred to in these links will, in
fact, be Creative Commons licenses which grant rights otherwise restricted
by copyright. The problems come in licenses which attempt to restrict
rights. One class of such licenses will be those that claim rights that are
already reserved under copyright. Such licenses are really redundant and
don't accomplish anything useful. I'll ignore those for now. The most
interesting cases will be those licenses that attempt to assert limitations
to rights which would normally be considered to be granted to consumers of
feeds. Such rights would include things like "Fair Use" and "implied
licenses." It is *vitally* important to our community that we ensure that
such restrictive licenses are not encouraged or facilitated by this rfc.
	There are those, I among them, who argue that the mere act of
encoding data in a syndication format such as RSS or Atom, posting that
content on an openly accessible web site, and doing such things as pinging
to publicize the presence of that content, creates a limited "implied
license" for others to access and copy the data for the purposes of
syndication. This is very much like the implied license to copy HTML into
system buffers, caches, network routers, local disks etc in the process of
reading it. With HTML, courts appear to accept that you have a right to do
something that would be prohibited by a strict reading of copyright law.
Under limited circumstances, you are allowed to make copies that are
technically necessary and facilitative to the achievement of the content
creator's assumed purpose of having you read the pages. Similarly, when you
publish to a syndication network, one accepts that there is an implied
license to do not only the same kind of copying that is permitted for HTML,
but also that you accept that your content will be processed by various
syndication-related intermediaries -- feed aggregators, feed filters, feed
format converters, publish/subscribe systems, etc. However, please note that
this is still a *limited* implied license. The fact that syndication is
permitted doesn't mean that the general creation of derivative works,
repurposing of feed content, etc. is permitted. The license doesn't allow
"stealing" -- it only allows moving the stuff around in the process of
getting it to readers.
	The syndication network can only work because we assume that there
is an implied right to syndicate. If, for some reason, we were to establish
that this implied right could be revoked or modified by licenses associated
with a feed or entry, then we'd probably have to shutdown the entire
syndication network until such time as every intermediary and aggregator was
modified to support license discovery and interpretation. The social and
economic cost of this destruction of one of the most exciting areas of
innovation on the net today would simply not be accepted by the courts -- at
least not in the USA (I believe). Courts aren't going to accept this
"poisoning of the stream" simply so that someone can commandeer the
syndication network and force it to process data in a manner different from
the way it was designed to work.
	Of course, one could argue that as long as the Atom license link was
used by everyone, then it should be easy for folk to make the adjustments
and thus the cost might not be too great. However, once we've accepted that
there is even one mechanism by which someone can publish content that
overrides the implied license to syndicate, we must ask the question: "In
how many ways can the override be expressed?" As far as the law is
concerned, there is nothing special about IETF standards. Thus, while the
IETF might say that you can use a license link to bind content and licenses,
the W3C might decide to create a "rights" link instead. ANSI might then
create a "copyright-assertion" link. And someone else might decide to use an
element instead of a link. The problem here is that operators of syndication
components and aggregators would have no means of being sure that they were
catching all the licenses associated with the feeds that they were
syndicating. Someone who was malicious might, in fact, create a new
"standard," publish content with a restrictive license, and then make a
bundle by suing everyone downstream. 
	I think courts won't permit a situation in which the consumer of
content has no idea how to determine if licenses are associated with content
in the same way that they don't let you rely on "Do not enter" signs written
in tiny, unreadable type. The courts would probably insist that legislatures
do as they did with the copyright symbol -- make a formal, legal
determination of how licenses are to be linked to. (Let's hope that we don't
get legislatures involved in the definition of Atom. We've got enough issues
to deal with already.)
	In any case, it may be that "Ignorance of the law is no excuse!"
however, ignorance of an optional, experimental extension to the Atom format
is certainly not a crime. No matter how earnestly content creators may be in
wanting to use the license link to restrict rights, they have no means of
compelling anyone to pay attention to or even take note of the links... Even
in the case of some system that can be shown to understand the license link
mechanism, it can be argued that in the absence of a legally accepted syntax
for stating restrictions on rights, that the reader can't compelled to
"understand" the limitations expressed. (Note: let's not talk about creating
a machine readable license format... Just about all useful methods of doing
so are already patented...)
	In summary:
	1. It is unwise to induce folk into believing that the license link
can be used to override the limited implied license to syndicate, and
	2. There is no way to compel anyone to take note of the links
anyway.
	The situation is, of course, different with things like Creative
Commons licenses. Courts are likely to say that any publisher who includes
the appropriate namespaces in their feeds and includes properly formatted
license links that point to Creative Commons licenses is demonstrating a
real knowledge and appreciation of the mechanism and is willingly granting
licenses to all those who share the same understanding of the mechanism and
willingness to use it. Basically, the publisher proves, by making the effort
and signaling via the published and controlled syntax, that they do, in
fact, wish to grant the rights expressed in the license. Readers of feeds
are then free to exploit their understanding of the publisher's signals to
exercise the rights granted -- just as they are free to refuse to understand
the restrictive licenses published by others.
	Thus, it would seem that the only effective use of the license link
is to grant rights not to restrict them.

The second sentence in 1.1 is:
>> Nor can a license associated with a feed or entry
>> restrict or forbid access to, redistribution, aggregation,
>> caching and display of those items by third party
>> intermediaries such as search engines and so-called
>> "online aggregators".
	This second part of 1.1 is stating support for the theory that the
act of publishing data in the Atom format creates an "implied license" for
the limited purpose of syndication and lists a number of processes which are
considered to be part of the syndication process. Hopefully, my discussion
of the first sentence explains what this is all about.
	My only suggestion for this sentence is that it might be less
strongly worded. Given that the law in this area is not settled, it might
make sense not to say "Nor can a license... restrict..." Rather, it might be
more accurate to say something like: "It is believed that a license ...
cannot restrict...."

	My apologies for such a long message...

	bob wyman





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To: Bob Wyman <bob@wyman.us>
Cc: "'Wendy Seltzer'" <wendy@seltzer.org>,
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On 2006-09-06 02:25:47 -0400, Bob Wyman wrote:

> 	Because of the nature of the tool being used here, a
> hyperlink, we must accept that the binding between content and
> license is a weak and fragile one. There is no guarantee that the
> content of the license associated with a feed at one instance
> will be the same as it is at some other instance. Also, there is
> no mechanism provided to ensure that claims made about what the
> license was at one instance can be proved at a later time.

I think this assessment mixes two aspects: The use of the
rel=license link as an *identifier* for a specific license (which is
pretty much what Creative Commons does), and the use of the link to
retrieve license information.

The value that this specification adds to Atom is mostly in the
"link-as-identifier" field: It enables software to offer, e.g.,
retrieval of feeds (or entries) by license.  Look at the Creative
Commons powered aspects of flickr search for a related example.  

Trying to dilute the value of the license link out of fear that the
link-as-retrieval-mechanism aspect is dangerous, however, impacts
the value of the link-as-identifier aspect. As you point out, the
weakness of the link between content and a specific license (in the
sense of legal code) causes problems for both the copyright holder
and the relying party.  A corollary of this is that, in fact, both
sides have an incentive to use licenses that are identified by a
stable URI.

Hence, I'd suggest that, in making balancing decisions for this
specification, emphasis be put on using URIs as *identifiers* for
licenses.  It's fine to point out the lack of an enforceable binding
on a technical level, but I don't think this spec is the place to
discuss the legal implications that this might have.

-- 
Thomas Roessler   <roessler@does-not-exist.org>




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On 2006-09-05 15:11:22 -0700, James M Snell wrote:

> The relationship is relatively simple.  The atom:rights element
> is always a human-readable statement of what rights are held over
> the feed or entry.  It's is the equivalent of saying "Copyright
> (c) James Snell" and cannot be relied upon to tell the consumer
> anything useful about what the consumer can do with the feed or
> entry.  The license link, on the other hand, is specifically
> intended to provide a reference to the license applied to the
> feed/entry; that is, what kinds of things others are allowed do
> with the feed/entry.

Well, the definition of the atom:rights field is really just another
way to describe what a license is. Namely, the law gives you certain
rights that you, and only you, can exercise.  A license is about
which of these rights you retain, and which ones you let others
exercise.

The example in section 2 of draft-snell-atompub-feed-license-08
actually uses the atom:rights field for indicating which license
applies.

How would that mix with a license link that points at another
Creative Commons License?  And what effect does that have for, say,
license-based search engines?

I don't think the spec can wriggle out of this by saying that the
two aren't entirely the same and maybe shouldn't conflict.

> >> - An atom:rights element on a feed sets the default for the
> >>  atom:rights elements on entries; a license link on a feed,
> >>  however, is expected to apply to the metadata and NOT to the
> >>  entries.

> >>  Why the difference in inheritance rules and semantics?

> This is something that I've debated back and forth on but the difference
> comes down to an issue with aggregated feeds.
> 
> Take, for instance, Sam Ruby's Planet feed
> (http://planet.intertwingly.net/atom.xml).  This feed consists of
> entries that originated from many different sources, some of which may
> have license links, some that might not.  If Sam decided to put a
> license link at the feed level, and if license links were inherited, it
> would mean that Sam's license would be extended over resources he may
> have no right to license.  Obviously, that's wrong.

Obviously, that's not obvious.  Who are we to tell that Sam hasn't
obtained the right to attach these licenses out-of-band?

> One two possible solution would be for Sam to some how indicate
> that an entry in his feed did not have a license link, but doing
> so could cause other problems (such as invalidating any XML
> digital signatures that may be covering the entry).  

> Also, it's possible that the entry originally came from a feed
> that did include a license link, but that some intermediary along
> the way failed to properly carry over the license link into the
> entry after separating it from the feed.  The bottom line is that
> license inheritance opens too many potentially significant
> issues. (and yes, these issues apply equally to the atom:rights
> element).

> The simple solution, then, is to specify that license links only
> cover the feed or entry containing the link.

I don't think this spec needs to deal with the case that license
links might be altered by intermediaries.  It's fine to mention that
in the Security Considerations section, but I don't think it's a
case that should influence the overall design.

In Atom, we so far have an atom:rights entry that describes licenses
on entries.  Either, it sets a default (with all the problems that
you describe), or, it sets the rights for a specific entry.  In what
way this gets used (and whether that use is the right one) is up to
the party that authors an entry or a feed.

The rel=license proposal moves away from this approach:  The
semantics here are that it makes a statement about whatever object
it is attached to -- either a feed (with peculiar semantics that
might quite well depend on the jurisdiction), or to entries that are
children of that feed.

This inconsistency is a recipe for confusion.

In the interest of consistency, I'd suggest to replicate the
semantics of atom:rights for whatever URI-based scheme is
introduced.  If there's a need for feed-level licenses, then that
should be marked up separately. (I can see use cases for that, see
below; I'm not sure it's something urgent.)

> >> - It's probably worth noting that there are jurisdictions in which
> >>  databases enjoy sui generis legal protection (e.g., the EU).  In
> >>  such jurisdictions, it might be reasonable to have license
> >>  information that refers to the collection, not just to its
> >>  metadata.

> The selection and arrangement of entries in the feed is covered by feeds
> license.

From draft-snell-atompub-feed-license-08:

   "License" link relations appearing within a feed MUST apply to
   the metadata of the containing feed element only and do not
   extend over the metadata or content of any contained entries.

I don't see the selection and arrangement in there.

It might be best to focus on licenses on entries for the moment, and
do licenses for metadata, selections and arrangements separately, if
at all.

> >> - The following statement:
> >>
> >>    Entry content might include or reference material from other
> >>    sources. Licenses associated with an entry MUST NOT be assumed
> >>    to cover such material.  Implementations cannot necessarily
> >>    trust that publishers have the right to license material claimed
> >>    to be covered by any associated license.  Care should be taken
> >>    when making decisions based on the referenced license.
> >>
> >>  ... takes all of the value out of this scheme.  The very point of
> >>  annotating content (even aggregate content) with a license is that
> >>  this license be trusted.
> > 
> > (I understand this to be, in part, a legal layman's overstatement;
> > I'll leave it to the lawyers to comment. ;)
> > 
> 
> Yes, I don't like this either.  But the fact remains that an entries
> content may include content from other sources that cannot be assumed to
> be covered by the license associated with the entry.  The analogous
> situation occurs in Open Source Software distributions in which
> dependencies shipped with a project may have their own licenses that are
> distinct from the license used for the project code itself.
> 
> The question really is whether or not this is worth calling out
> explicitly in the spec.

I'll give a +1 to Wendy's suggestion to just drop this.


There's one more point that the spec might need to drill down on: It
is not clear to me whether atom:rights -- or rel=license, for that
matter -- applies to the material in an entry [ultimately, metadata
about a resource], or to the (in Atom speak) alternative versions
[the resource that the entry is about, in RDF speak].  This probably
doesn't matter too much for blog data; it likely does matter in
other contexts.

I'd hope that I'm missing some point, but quite possibly there needs
to be an explicit decision here whether the license link is expected
to apply only to the material in the entry, or to the "alternative
versions" [resources the entry is about] as well.  

Regards,
-- 
Thomas Roessler   <roessler@does-not-exist.org>




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On 2006-09-05 22:02:59 -0700, John Panzer wrote:

> Here's my rationale: Atom has explicit support in the core RFC
> 4287 syntax for 'synthetic' feeds containing entries from
> multiple sources produced by multiple authors with different
> copyrights.  RSS 2.0 doesn't have this core support.  So in the
> case of Atom, the issue is a bit more urgent.  So tackling the
> Atom case first makes sense to me.

This is an important use case for having per-item license links.  

I do not see, however, how this is a reason against having per-feed
default licenses, consistent with atom:rights.  Note, in particular,
that an aggregating party may very well be in a position to make
licensing assertions about all the entries in a feed.

-- 
Thomas Roessler   <roessler@does-not-exist.org>




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* Thomas Roessler <roessler@does-not-exist.org> [2006-09-06 11:45]:
> On 2006-09-05 15:11:22 -0700, James M Snell wrote:
> > Take, for instance, Sam Ruby's Planet feed
> > (http://planet.intertwingly.net/atom.xml).  This feed
> > consists of entries that originated from many different
> > sources, some of which may have license links, some that
> > might not.  If Sam decided to put a license link at the feed
> > level, and if license links were inherited, it would mean
> > that Sam's license would be extended over resources he may
> > have no right to license.  Obviously, that's wrong.
>=20
> Obviously, that's not obvious.  Who are we to tell that Sam
> hasn't obtained the right to attach these licenses out-of-band?

That may be a good point in this instance, but an irrelevant one.

James=E2=80=99 points out that there may be feeds where the feed
publisher has the rights to the feed as a collection, but not to
the content of individual entries. Since these cases exist, it
would be a bad idea for the licence to inherit from the feed to
entries in it.

Whether Sam in particular is or is not in that position does not
affect the principle. He=E2=80=99s not, btw: he republishes my content,
but he has no permission from me to relicense it.

Regards,
--=20
Aristotle Pagaltzis // <http://plasmasturm.org/>




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On 2006-09-06 12:21:24 +0200, A. Pagaltzis wrote:

> James=E2=80=99 points out that there may be feeds where the feed
> publisher has the rights to the feed as a collection, but not to
> the content of individual entries. Since these cases exist, it
> would be a bad idea for the licence to inherit from the feed to
> entries in it.

The conclusion here is fallacious: These cases are a use case for
having license annotations on the feed level.  As I said elsewhere,
I'm fine with that.

However, this does not mean that the capability to set a licensing
default on the feed level is a bad thing by itself -- in particular
when that is how the other mechanism works.

We are simply talking about different use cases, and violently
agreeing that it's a bad thing to confuse these.

So, here's the proposal:

- Use <link rel=3D"license"/> for entry licenses -- either on the feed
  level, setting a default analogous to what atom:rights does, or on
  the element level.

- Introduce <link rel=3D"collection-license"/> (or whatever else you
  find suitable) for licenses about the collection, to be used only
  on the feed level.

Regards,
--=20
Thomas Roessler   <roessler@does-not-exist.org>




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The problem with specifying a per-feed default license is that there is
currently no way of explicitly indicating that an entry does not have a
license or that any particular entry should not inherit the default
feed-level license.

- james

Thomas Roessler wrote:
> On 2006-09-05 22:02:59 -0700, John Panzer wrote:
> 
>> Here's my rationale: Atom has explicit support in the core RFC
>> 4287 syntax for 'synthetic' feeds containing entries from
>> multiple sources produced by multiple authors with different
>> copyrights.  RSS 2.0 doesn't have this core support.  So in the
>> case of Atom, the issue is a bit more urgent.  So tackling the
>> Atom case first makes sense to me.
> 
> This is an important use case for having per-item license links.  
> 
> I do not see, however, how this is a reason against having per-feed
> default licenses, consistent with atom:rights.  Note, in particular,
> that an aggregating party may very well be in a position to make
> licensing assertions about all the entries in a feed.
> 




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Date: Wed, 6 Sep 2006 16:43:58 +0200
From: Thomas Roessler <roessler@does-not-exist.org>
To: James M Snell <jasnell@gmail.com>
Cc: John Panzer <jpanzer@aol.net>, Mike Linksvayer <ml@creativecommons.org>,
        Ben Adida <ben@mit.edu>, Lisa Dusseault <lisa@osafoundation.org>,
        atom-syntax <atom-syntax@imc.org>, wendy@seltzer.org
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That means that, in some use cases, setting a default is the wrong
thing to do.  That's the same limitation you have for atom:rights.
It's a limitation that can be stated in the specification.  But I
don't see how it is a limitation that means there must not be a
default license feature available to those who decide to use it.
-- 
Thomas Roessler   <roessler@does-not-exist.org>






On 2006-09-06 06:51:00 -0700, James M Snell wrote:
> From: James M Snell <jasnell@gmail.com>
> To: John Panzer <jpanzer@aol.net>, James M Snell <jasnell@gmail.com>,
> 	Mike Linksvayer <ml@creativecommons.org>, Ben Adida <ben@mit.edu>,
> 	Lisa Dusseault <lisa@osafoundation.org>,
> 	atom-syntax <atom-syntax@imc.org>, wendy@seltzer.org
> Date: Wed, 06 Sep 2006 06:51:00 -0700
> Subject: Re: atom liense extension (was Re: [cc-tab] *important* heads
> 	up)
> List-ID: <atom-syntax.imc.org>
> X-Spam-Level: 
> 
> 
> The problem with specifying a per-feed default license is that there is
> currently no way of explicitly indicating that an entry does not have a
> license or that any particular entry should not inherit the default
> feed-level license.
> 
> - james
> 
> Thomas Roessler wrote:
> > On 2006-09-05 22:02:59 -0700, John Panzer wrote:
> > 
> >> Here's my rationale: Atom has explicit support in the core RFC
> >> 4287 syntax for 'synthetic' feeds containing entries from
> >> multiple sources produced by multiple authors with different
> >> copyrights.  RSS 2.0 doesn't have this core support.  So in the
> >> case of Atom, the issue is a bit more urgent.  So tackling the
> >> Atom case first makes sense to me.
> > 
> > This is an important use case for having per-item license links.  
> > 
> > I do not see, however, how this is a reason against having per-feed
> > default licenses, consistent with atom:rights.  Note, in particular,
> > that an aggregating party may very well be in a position to make
> > licensing assertions about all the entries in a feed.
> > 
> 
> 




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From: "John Panzer" <jpanzer@aol.net>
Subject: Re: atom license extension (Re: [cc-tab] *important* heads up)
To: "Bob Wyman" <bob@wyman.us>
cc: "'Wendy Seltzer'" <wendy@seltzer.org>,
        "'James M Snell'" <jasnell@gmail.com>,
        "'Thomas Roessler'" <tlr@w3.org>,
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
  <title></title>
</head>
<body bgcolor="#ffffff">
<font face="Arial,sans-serif"><font size="2">Bob Wyman wrote:
</font></font>
<blockquote cite="mid006f01c6d17d$4a91bca0$6400a8c0@BOBSLAPTOP"
 type="cite"><font face="Arial,sans-serif" size="2"></font><font
 size="2"><font face="Arial,sans-serif">...</font></font>
  <pre wrap="">The most<br>interesting cases will be those licenses that attempt to assert limitations<br>to rights which would normally be considered to be granted to consumers of<br>feeds. Such rights would include things like "Fair Use" and "implied<br>licenses." It is *vitally* important to our community that we ensure that<br>such restrictive licenses are not encouraged or facilitated by this rfc.<br>  </pre>
  <font face="Arial,sans-serif" size="2"></font></blockquote>
<font face="Arial,sans-serif"><font size="2">This is a critical point.&nbsp;
Without this, implementors cannot safely
ignore licenses they don't understand (falling back to things like
"fair use" if they can't find any licenses that grant additional
copying rights).&nbsp; This means that implementors would likely have to
drop feeds containing new licenses on the floor, meaning that new
license schemes would never be deployed.<br>
</font></font>
<blockquote cite="mid006f01c6d17d$4a91bca0$6400a8c0@BOBSLAPTOP"
 type="cite"><font face="Arial,sans-serif" size="2"> </font>
  <pre wrap="">...<br>    Thus, it would seem that the only effective use of the license link<br>is to grant rights not to restrict them.</pre>
</blockquote>
<font size="2"><font face="Arial,sans-serif">Yes.&nbsp; Given the current
murky and complicated legal situation with implied licenses, fair use,
etc., granting explicit and well defined rights is a huge win for
everyone.<br>
<br>
</font></font>
<blockquote cite="mid006f01c6d17d$4a91bca0$6400a8c0@BOBSLAPTOP"
 type="cite">
  <pre wrap=""><br>The second sentence in 1.1 is:<br>  </pre>
  <font face="Arial,sans-serif" size="2"> </font>
  <blockquote type="cite"><font face="Arial,sans-serif" size="2"> </font>
    <blockquote type="cite"><font face="Arial,sans-serif" size="2"> </font>
      <pre wrap="">Nor can a license associated with a feed or entry<br>restrict or forbid access to, redistribution, aggregation,<br>caching and display of those items by third party<br>intermediaries such as search engines and so-called<br>"online aggregators".<br>      </pre>
      <font face="Arial,sans-serif" size="2"> </font></blockquote>
    <font face="Arial,sans-serif" size="2"> </font></blockquote>
  <font face="Arial,sans-serif" size="2"> </font>
  <pre wrap=""><!---->    This second part of 1.1 is stating support for the theory that the<br>act of publishing data in the Atom format creates an "implied license" for<br>the limited purpose of syndication and lists a number of processes which are<br>considered to be part of the syndication process. Hopefully, my discussion<br>of the first sentence explains what this is all about.<br>    My only suggestion for this sentence is that it might be less<br>strongly worded. Given that the law in this area is not settled, it might<br>make sense not to say "Nor can a license... restrict..." Rather, it might be<br>more accurate to say something like: "It is believed that a license ...<br>cannot restrict...."<br></pre>
</blockquote>
<font size="2"><font face="Arial,sans-serif">How about (IANAL of
course):<br>
<br>
</font></font><font size="2"><font face="Arial,sans-serif">"Nor can a
license.... restrict or remove any implied copy or usage rights which
would otherwise exist in the absence of the license."<br>
<br>
The intent being that adding a license, or a new type of license, is
always safe:&nbsp; If what you're doing with content is allowable, if the
feed provider adds a license, it is still allowable.&nbsp; <br>
<br>
-John Panzer<br>
<br>
</font></font><font face="Arial,sans-serif"><font size="2"></font></font>
</body>
</html>




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From: "Bob Wyman" <bob@wyman.us>
To: "'Thomas Roessler'" <roessler@does-not-exist.org>,
        "'Bob Wyman'" <bob@wyman.us>
Cc: "'Wendy Seltzer'" <wendy@seltzer.org>,
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Subject: RE: atom license extension (Re: [cc-tab] *important* heads up)
Date: Wed, 6 Sep 2006 12:47:09 -0400
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Thomas Roessler wrote:
> It's fine to point out the lack of an enforceable binding on a
> technical level, but I don't think this spec is the place to
> discuss the legal implications that this might have.
	If the spec does not make statements concerning the intended legal
implications of a feature which clearly addresses legal issues, the result
will almost inevitably be wide-spread misunderstanding of the implications
of using the feature. The mere act of going to the trouble of specifying the
license link indicates that the authors expect that there will be some
implication of having used the feature. The question that many readers will
have is: "What are the intended implications?" Leaving the answer to guess
work is not useful, I think.
	Given the unsettled and potentially dynamic state of the law in this
area, I certainly agree that the spec should not make pronouncements
concerning what the law is in this case. But I don't see any valid argument
against making statements of intent that may, or may not, be in conflict
with the law as it is or may one day be.
	The authors of the specification have, I think, not only good reason
to state their intention but an obligation to do so. Warning implementers
that the use of the license link may not, in at least some situations and in
some legal systems, create a legally enforceable binding is the right thing
to do.

	bob wyman





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Subject: Re: atom license extension (Re: [cc-tab] *important* heads up)
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On 2006-09-06 12:47:09 -0400, Bob Wyman wrote:

> 	The authors of the specification have, I think, not only
> good reason to state their intention but an obligation to do so.
> Warning implementers that the use of the license link may not, in
> at least some situations and in some legal systems, create a
> legally enforceable binding is the right thing to do.

The intent of this spec is to give those who publish a feed a way to
assert what licensing conditions apply to certain parts of that
feed.

That's what the spec should say; anything else -- in particular
elaborate discussions of corner cases -- is going to cause
confusion.

-- 
Thomas Roessler   <roessler@does-not-exist.org>




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        "'Bob Wyman'" <bob@wyman.us>
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Subject: RE: atom license extension (Re: [cc-tab] *important* heads up)
Date: Wed, 6 Sep 2006 13:46:54 -0400
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Thomas Roessler wrote:
> The intent of this spec is to give those who publish a
> feed a way to assert what licensing conditions apply to
> certain parts of that feed.
	If a mechanism is provided for "asserting" rights, without warning
folk that the assertions may not be effective, the assumption on the part of
many folk will be that the assertion is, in fact, effective. The result will
be confusion and that confusion can be costly. (Note: I also don't think it
is responsible to sell guns without safety warnings...)
	In this case, protection of the limited implied license to syndicate
is a matter of extreme importance to the syndication network. Those of us
who run or have run syndication services already have enough trouble with
folk who stick random "rights language" in their feeds and then think that
these assertions are somehow effective -- or even that the automated
processes that we run can recognize that the language is present. The number
of folk who have attempted, usually unintentionally, to "poison the stream"
of syndication is large.
	One excellent example of the confusion that exists is that many
people actually think that Creative Commons licenses are restrictive! While
the CC licenses are generally well drafted, very few people actually read
the things. As a result, there are numerous folk who honestly believe that
Creative Commons licenses can be used as a form of DRM to restrict use. They
believe, for instance, that a CC non-commercial use license actually
restricts commercial use when, in fact, such a license is explicitly silent
on the subject and simply leaves in place pre-existing restrictions (such as
copyright), if there are any, on commercial use.
	In this context, I'm particularly concerned about people who will
try to use license assertions to override or diminish the vital but limited
implied license to syndicate -- for instance, when the syndication is
performed by "commercial" organizations. We already have many folk who think
that a CC Non-Commercial license has this effect when attached to a feed or
entry. I think it is in our interest to do what we can to avoid further
confusion by warning people of the limits of their assertions in the
specification. There will still be many who don't read the spec; however,
we'll be providing support to those who try to explain it...

	bob wyman





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To: "Bob Wyman" <bob@wyman.us>, "John Panzer" <jpanzer@aol.net>
From: Wendy Seltzer <wendy@seltzer.org>
Subject: Re: atom license extension (Re: [cc-tab] *important* heads up)
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At 12:29 PM 9/6/2006, John Panzer wrote:
>Bob Wyman wrote:
>>...
>>The most
>>interesting cases will be those licenses that attempt to assert limitations
>>to rights which would normally be considered to be granted to consumers of
>>feeds. Such rights would include things like "Fair Use" and "implied
>>licenses." It is *vitally* important to our community that we ensure that
>>such restrictive licenses are not encouraged or facilitated by this rfc.

Restrictions on fair use couldn't be imposed unilaterally by license, 
but only by a contract (fictionally accepted by click-wrap, or 
actually negotiated and accepted).

The concern about limiting implied licenses is important, though.  By 
definition, an implied license is one that's presumed from the 
context of an offering and by the absence of a contrary explicit 
license.  If as a factual matter, many people have been acting based 
on implied licenses of broader scope than either fair use or what 
would be chosen in an explicitly linked license, then you might say 
it's better not to provide this encouragement to link licenses at all 
(and hoping that time and general practice will morph those implied 
terms into fair uses).

If the rfc encourages people to add licenses, it opens up the 
possibility that their explicit terms will contradict and override 
what has previously been implied.

>>
>This is a critical point.  Without this, implementors cannot safely 
>ignore licenses they don't understand (falling back to things like 
>"fair use" if they can't find any licenses that grant additional 
>copying rights).  This means that implementors would likely have to 
>drop feeds containing new licenses on the floor, meaning that new 
>license schemes would never be deployed.
>>
>>...
>>     Thus, it would seem that the only effective use of the license link
>>is to grant rights not to restrict them.
>Yes.  Given the current murky and complicated legal situation with 
>implied licenses, fair use, etc., granting explicit and well defined 
>rights is a huge win for everyone.

I don't think there's a legal mechanism for telling people "you may 
only use this format if you grant a license equally or more 
permissive than X."  (at least none short of patent claims on the 
format itself...)

--Wendy




>>The second sentence in 1.1 is:
>>
>>>>
>>>>Nor can a license associated with a feed or entry
>>>>restrict or forbid access to, redistribution, aggregation,
>>>>caching and display of those items by third party
>>>>intermediaries such as search engines and so-called
>>>>"online aggregators".
>>>>
>>
>>     This second part of 1.1 is stating support for the theory that the
>>act of publishing data in the Atom format creates an "implied license" for
>>the limited purpose of syndication and lists a number of processes which are
>>considered to be part of the syndication process. Hopefully, my discussion
>>of the first sentence explains what this is all about.
>>     My only suggestion for this sentence is that it might be less
>>strongly worded. Given that the law in this area is not settled, it might
>>make sense not to say "Nor can a license... restrict..." Rather, it might be
>>more accurate to say something like: "It is believed that a license ...
>>cannot restrict...."
>How about (IANAL of course):
>
>"Nor can a license.... restrict or remove any implied copy or usage 
>rights which would otherwise exist in the absence of the license."
>
>The intent being that adding a license, or a new type of license, is 
>always safe:  If what you're doing with content is allowable, if the 
>feed provider adds a license, it is still allowable.
>
>-John Panzer

--
Wendy Seltzer -- wendy@seltzer.org
Visiting Assistant Professor of Law, Brooklyn Law School
Fellow, Berkman Center for Internet & Society
http://cyber.law.harvard.edu/seltzer.html
http://www.chillingeffects.org/  




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Subject: RE: atom license extension (Re: [cc-tab] *important* heads up)
Date: Wed, 6 Sep 2006 16:04:08 -0400
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Wendy Seltzer wrote:
> The concern about limiting implied licenses is important...
> If the rfc encourages people to add licenses, it opens up
> the possibility that their explicit terms will contradict
> and override what has previously been implied.
	This is precisely why I have normally argued against adding rights
and licenses mechanism to Atom and other formats. Unfortunately, it is has
been a losing battle (Atom has <rights/>) so, I'm now trying the tack of
attempting to get explanatory text and weakness in the language in order to
mitigate some of the damage that might be caused.
	Oddly, I think part of the push for these dangerous licensing
mechanisms is the result of success of Creative Commons. We may be seeing
that a movement intended to expand rights will indirectly create a situation
where rights are more easily restricted. People really like the CC mechanism
for granting rights and as a result want cleaner and better understood means
for associating Creative Commons licenses with their content. Unfortunately,
an unintended consequence of satisfying this desire to publish CC licenses
might be that it becomes easier and more common for folk to publish
restrictive licenses.
	Readers of this thread might be interested to see that Denise Howell
has been discussing very similar issues on her new Logarithms blog.[1][2]
I've put some comments in there and have also responded in length concerning
what I, as a non-lawyer, consider some of the implied licenses that attach
to RSS/Atom syndicated content.[3]

	bob wyman

[1] http://blogs.zdnet.com/Howell/?p=17
[2] http://blogs.zdnet.com/Howell/?p=18
[3] http://www.wyman.us/main/2006/09/magazine_or_mus.html





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From: Antone Roundy <antone@geckotribe.com>
Subject: Re: atom license extension (Re: [cc-tab] *important* heads up)
Date: Wed, 6 Sep 2006 16:08:06 -0600
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On Sep 6, 2006, at 7:51 AM, James M Snell wrote:
> The problem with specifying a per-feed default license is that  
> there is
> currently no way of explicitly indicating that an entry does not  
> have a
> license or that any particular entry should not inherit the default
> feed-level license.

With respect to atom:rights (from RFC 4287 section 4.2.10):

    If an atom:entry element does not contain an atom:rights element,
    then the atom:rights element of the containing atom:feed element, if
    present, is considered to apply to the entry.

Thus, at the entry level, <atom:rights /> would (certainly ought to!)  
detach a feed level atom:rights element from the entry without  
replacing it with anything.  With <link rel="license"..., I'm not  
sure how you'd do the same thing.  Is it possible to specify a null  
URI?  <link rel="license" href="" /> points to the in-scope xml:base  
URI, right?  Perhaps the specification could define a "null license"  
URI.

With respect to the issue of aggregate feeds, I had thought that the  
existence of an atom:source element at the entry level blocked any  
"inheritance" of the feed metadata, but looking at RFC 4287, I don't  
see that explicitly stated.  Certainly if atom:source contains  
atom:rights, then that element overrides the feed-level atom:rights  
of the aggregate feed, but if neither atom:source nor atom:entry  
contains an atom:rights element, what then?  Perhaps in that case,  
the aggregator should add <atom:rights /> as a child of atom:source  
(I'd think that preferable to adding it as a child of atom:entry).

On Sep 6, 2006, at 4:38 AM, Thomas Roessler wrote:
> So, here's the proposal:
>
> - Use <link rel="license"/> for entry licenses -- either on the feed
>   level, setting a default analogous to what atom:rights does, or on
>   the element level.
>
> - Introduce <link rel="collection-license"/> (or whatever else you
>   find suitable) for licenses about the collection, to be used only
>   on the feed level.

If there's a @rel="license" at the feed level, but no rel="collection- 
license", does the @rel="license" also become a "collection- 
license"?  (People who don't read the spec would probably think so).   
If there is no license for the collection, but one wishes to specify  
a default license for the entries, a "null license" would once again  
be useful.

Antone




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Subject: RE: atom license extension (Re: [cc-tab] *important* heads up)
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Antone Roundy wrote:
> With respect to the issue of aggregate feeds, I had thought
> that the existence of an atom:source element at the entry
> level blocked any "inheritance" of the feed metadata, but
> looking at RFC 4287, I don't see that explicitly stated.
	It's not explicit, but it is implicit. The <source/> element
preserves the entry's feed metadata. Thus, to find the feed metadata
associated with an entry which has an atom:source, you should look to the
preserved data in the atom:source element (or the source feed itself...) --
you should NOT look to the metadata of the feed within which you found the
entry.
	Atom:source says, essentially: "This entry is not of this feed. It
is foreign and should be interpreted as such." Thus, the feed metadata of
the containing feed should never be allowed to leak into the interpretation
of an entry which contains an atom:source. To do so would make syndication,
aggregation, etc. a complete mess.

	bob wyman





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Wednesday, September 6, 2006, 11:38:13 AM, you wrote:

> So, here's the proposal:

> - Use <link rel="license"/> for entry licenses -- either on the feed
>   level, setting a default analogous to what atom:rights does, or on
>   the element level.

I think that there are data modelling issues with this approach. I
don't think that the inheritance of extensions from the 'feed
document', to the entries contained within that document is supported
by the spec, nor would it be likely to be supported by typical
implementations of stateful feed stores, frameworks and APIs.

Feeds and entries are seperate entities with seperate life-cycles.
Stateful feed platforms, such as the Windows feed platform,
typically store a single instance of feed metadata, and a single
instance of entry metadata.

When, for example, a feed title changes, the change applies to the
feed as a whole; it isn't localised to only apply to the entries that
were present in that feed document at the time of the change, because
each entry doesn't typically store its own private copy of feed
metadata.

Implementors can cope with the inheritance of atom:rights and
atom:author, because it is explicitly described in the spec, and
implementors know that they must implement the inheritance at the
document parsing stage, and apply the feed-level data to the entry
before storing the entry before they attempt to store the entries in a
database or whatever, but implementations cannot be expected to apply
all feed-level extensions to the entries that they were transmitted
with, just in case any of them might expect to implement feed document
inheritance.

Feed properties are properties of the feed, not the feed document. An
extension can't implement atom:rights/atom:author style inheritance
from the feed document to the contained entries.


-- 
Dave




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From: Karl Dubost <karl@w3.org>
Subject: Re: atom license extension (Re: [cc-tab] *important* heads up)
Date: Thu, 7 Sep 2006 13:55:53 +0900
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Le 7 sept. 06 =E0 01:29, John Panzer a =E9crit :
> This is a critical point.  Without this, implementors cannot safely =20
> ignore licenses they don't understand (falling back to things like =20
> "fair use" if they can't find any licenses that grant additional =20
> copying rights).  This means that implementors would likely have to =20
> drop feeds containing new licenses on the floor, meaning that new =20
> license schemes would never be deployed.

People with legal background will confirm or not, but "fair use" =20
doesn't exist in the same way in all countries.

Offering a mechanism to provide licensing information is good.
Encouraging a *legal* fallback mechanism is bad, very bad.

IMHO, when the implementors do not understand the licenses, they have =20
no rights to do things with content (because it's highly dependant of =20
local laws)

--=20
Karl Dubost - http://www.w3.org/People/karl/
W3C Conformance Manager, QA Activity Lead
   QA Weblog - http://www.w3.org/QA/
      *** Be Strict To Be Cool ***






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Subject: Re: atom license extension (Re: [cc-tab] *important* heads up)
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Karl Dubost wrote:

> IMHO, when the implementors do not understand the licenses, they have n=
o=20
> rights to do things with content (because it's highly dependant of loca=
l=20
> laws)

Ignorance of the law is no excuse. Implementors have the rights they=20
have under the applicable set of laws, irrespective of whether or not=20
they understand those rights.

--=20
=EF=BB=BFElliotte Rusty Harold  elharo@metalab.unc.edu
Java I/O 2nd Edition Just Published!
http://www.cafeaulait.org/books/javaio2/
http://www.amazon.com/exec/obidos/ISBN=3D0596527500/ref=3Dnosim/cafeaulai=
tA/




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Subject: Re: atom license extension (Re: [cc-tab] *important* heads up)
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karl@w3.org wrote:

>
>
> Le 7 sept. 06 =E0 01:29, John Panzer a =E9crit :
>
>> This is a critical point.  Without this, implementors cannot safely =20
>> ignore licenses they don't understand (falling back to things like =20
>> "fair use" if they can't find any licenses that grant additional =20
>> copying rights).  This means that implementors would likely have to =20
>> drop feeds containing new licenses on the floor, meaning that new =20
>> license schemes would never be deployed.
>
>
> People with legal background will confirm or not, but "fair use" =20
> doesn't exist in the same way in all countries.
>
> Offering a mechanism to provide licensing information is good.
> Encouraging a *legal* fallback mechanism is bad, very bad.
>
> IMHO, when the implementors do not understand the licenses, they have =20
> no rights to do things with content (because it's highly dependant of =20
> local laws)
>
That's why I said 'things like' "fair use".  Our legal department has=20
been having fun with this topic over the past several months.  I do=20
agree with you that encouraging people to provide licenses is good.  I=20
think that there are fallback mechanisms whether or not we encourage=20
them.  I think that a fallback mechanism -- implied rights to copy for=20
limited purposes -- is a good thing, and whatever gets specified should=20
not work against it.  It's an unfortunate fact that the available=20
mechanisms are 'squishy' and vary with local laws, but they are better=20
than nothing, which seems to be what you advocate.

More practically, if every feed reader and processor has to be modified=20
to understand a license before the license can be used in published=20
feeds, the ability to deploy and experiment with licenses will be=20
drastically reduced.  Which drastically reduces the utility of having=20
licenses.

(Let's say that  Doc Searls somehow discovers a license that would deny=20
sploggers more than implied rights to his content while allowing liberal=20
use for others[1], and deploys it.  Are you saying that all of his=20
readers' feed software would have to drop his feed content until they're=20
upgraded to understand the license?)

[1] http://doc.weblogs.com/2006/08/28





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Subject: RE: atom license extension (Re: [cc-tab] *important* heads up)
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John Panzer asks of Karl Dubost:
> (Let's say that  Doc Searls somehow discovers a license that
> would deny sploggers more than implied rights to his content
> while allowing liberal use for others[1], and deploys it.
>  Are you saying that all of his readers' feed software would
> have to drop his feed content until they're upgraded to
> understand the license?) [1] http://doc.weblogs.com/2006/08/28
	I think John's question can be (aggressively) rephrased as: "Can Doc
Searls, by inserting a license in his feed, 'poison' the entire syndication
system that we've built over the last few years?" (i.e. Can he do things
that make it unsafe or illegal for people to do things which the syndication
system was intentionally built to permit and which he knew were being done
before he willingly inserted his content into the syndication network?) I
don't think so.
	As argued in other messages, I strongly believe that we should not
do anything that hinders or conflicts with the establishment or recognition
of a limited implied license to syndicate content which is formatted using
RSS/Atom and is made openly available on the network. (An interesting
question, of course, would be: "What does it mean to 'syndicate'?")
	In any case, there is a general problem of "proper notice" here. As
mentioned before, there is nothing special about an optional IETF protocol
extension. This subject of inserting licenses in content should be discussed
in a general sense -- not limited to this specific protocol extension. 
	A vital question to ask is: What is proper notice of the presence of
a license? No IETF standard has the force of law. Readers are not obligated
to understand or even take note of the license links. Thus, no one using it
should be able to have any expectation that readers will take note of it any
more than they would of many other possible means of inserting licenses or
references to them in content. Publishers and consumers should both be
working on the assumption that normal copyright exists (i.e *all rights
reserved*) except where there are fair use privileges of implied licenses
that weaken the *all rights* default.)
	If we were to allow or encourage any one mechanism to associate
restrictive licenses with content, we establish a precedent that would allow
or encourage others as well. Any other "standards group" or informal
collection of one or more persons could decide to define a new mechanism --
just like the IETF did. At that point, no reader could safely consume
content since no matter how many mechanisms they supported there might be
some others that they didn't know about. The issue here is about proper
notice... How can we obligate folk to respect licenses that they have no
means of discovering?
	We should also ask: "At what point does a restrictive license become
operative?" Imagine that I decided that reading (copying) of my feeds by
commercial organizations was to be prohibited. Could I bar such copying by
putting a license in the content itself? Of course, if I did, that means
that in order to discover that copying was not permitted the reader would
have to actually do the thing which is prohibited. Clearly, even if there
was some way to put effective restrictive licenses in content, there would
have to remain some "implied license" exceptions to the *all rights"
provision of copyright.
	We are all best served by an assumption that copyright leaves "all
rights" reserved to the publisher and that only "fair use," "limited implied
license to syndicate," and "explicit license grants (like CC)" limit the
totality of those rights. With this in mind it might be best to change from
a "license" link to a "rights-grant" link... In other words, frame this link
type as something which can *only* be used to broaden rights, not restrict
them.

	bob wyman






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Subject: Re: atom license extension (Re: [cc-tab] *important* heads up)
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Wendy Seltzer wrote:

> ...
>
> The concern about limiting implied licenses is important, though.  By 
> definition, an implied license is one that's presumed from the context 
> of an offering and by the absence of a contrary explicit license.  If 
> as a factual matter, many people have been acting based on implied 
> licenses of broader scope than either fair use or what would be chosen 
> in an explicitly linked license, then you might say it's better not to 
> provide this encouragement to link licenses at all (and hoping that 
> time and general practice will morph those implied terms into fair uses).
>
> If the rfc encourages people to add licenses, it opens up the 
> possibility that their explicit terms will contradict and override 
> what has previously been implied.

That's a worrying Heisenburg effect.

>> This is a critical point.  Without this, implementors cannot safely 
>> ignore licenses they don't understand (falling back to things like 
>> "fair use" if they can't find any licenses that grant additional 
>> copying rights).  This means that implementors would likely have to 
>> drop feeds containing new licenses on the floor, meaning that new 
>> license schemes would never be deployed.
>>
>>>
>>> ...
>>>     Thus, it would seem that the only effective use of the license link
>>> is to grant rights not to restrict them.
>>
>> Yes.  Given the current murky and complicated legal situation with 
>> implied licenses, fair use, etc., granting explicit and well defined 
>> rights is a huge win for everyone.
>
>
> I don't think there's a legal mechanism for telling people "you may 
> only use this format if you grant a license equally or more permissive 
> than X."  (at least none short of patent claims on the format itself...)

No, but I think there may be a technical mechanism for saying "this 
particular extension only lets you grant rights with each new license 
link, not take them away":

> ...
>
>> How about (IANAL of course):
>>
>> "Nor can a license.... restrict or remove any implied copy or usage 
>> rights which would otherwise exist in the absence of the license."
>>
>> The intent being that adding a license, or a new type of license, is 
>> always safe:  If what you're doing with content is allowable, if the 
>> feed provider adds a license, it is still allowable.
>>
There is a parallel with the principle of substitutability [1] in 
software engineering, which allows extension while maintaining desirable 
invariants (in this case, the ability to what one would naturally expect 
to do with a feed).

[1] http://en.wikipedia.org/wiki/Liskov_substitution_principle

-John Panzer
http://abstractioneer.org




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Date: Fri, 08 Sep 2006 08:21:59 -0700
From: James M Snell <jasnell@gmail.com>
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To: Bob Wyman <bob@wyman.us>
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        "'Wendy Seltzer'" <wendy@seltzer.org>,
        "'Mike Linksvayer'" <ml@creativecommons.org>,
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Subject: Re: atom license extension (Re: [cc-tab] *important* heads up)
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I think the discussion around this has been absolutely excellent.  Lots
of very good information and perspectives.  At this point I need to stew
over things for a few days and think about how to proceed with the
extension.

In addition to the several technical changes that I may end up making to
the specification, I am thinking now that a detailed description of the
non-technical issues surrounding this spec would be a great addition to
the document.  I'm just not sure I'm qualified to write such a thing myself.

- James

Bob Wyman wrote:
> John Panzer asks of Karl Dubost:
>> (Let's say that  Doc Searls somehow discovers a license that
>> would deny sploggers more than implied rights to his content
>> while allowing liberal use for others[1], and deploys it.
>>  Are you saying that all of his readers' feed software would
>> have to drop his feed content until they're upgraded to
>> understand the license?) [1] http://doc.weblogs.com/2006/08/28
> 	I think John's question can be (aggressively) rephrased as: "Can Doc
> Searls, by inserting a license in his feed, 'poison' the entire syndication
> system that we've built over the last few years?" (i.e. Can he do things
> that make it unsafe or illegal for people to do things which the syndication
> system was intentionally built to permit and which he knew were being done
> before he willingly inserted his content into the syndication network?) I
> don't think so.
> 	As argued in other messages, I strongly believe that we should not
> do anything that hinders or conflicts with the establishment or recognition
> of a limited implied license to syndicate content which is formatted using
> RSS/Atom and is made openly available on the network. (An interesting
> question, of course, would be: "What does it mean to 'syndicate'?")
> 	In any case, there is a general problem of "proper notice" here. As
> mentioned before, there is nothing special about an optional IETF protocol
> extension. This subject of inserting licenses in content should be discussed
> in a general sense -- not limited to this specific protocol extension. 
> 	A vital question to ask is: What is proper notice of the presence of
> a license? No IETF standard has the force of law. Readers are not obligated
> to understand or even take note of the license links. Thus, no one using it
> should be able to have any expectation that readers will take note of it any
> more than they would of many other possible means of inserting licenses or
> references to them in content. Publishers and consumers should both be
> working on the assumption that normal copyright exists (i.e *all rights
> reserved*) except where there are fair use privileges of implied licenses
> that weaken the *all rights* default.)
> 	If we were to allow or encourage any one mechanism to associate
> restrictive licenses with content, we establish a precedent that would allow
> or encourage others as well. Any other "standards group" or informal
> collection of one or more persons could decide to define a new mechanism --
> just like the IETF did. At that point, no reader could safely consume
> content since no matter how many mechanisms they supported there might be
> some others that they didn't know about. The issue here is about proper
> notice... How can we obligate folk to respect licenses that they have no
> means of discovering?
> 	We should also ask: "At what point does a restrictive license become
> operative?" Imagine that I decided that reading (copying) of my feeds by
> commercial organizations was to be prohibited. Could I bar such copying by
> putting a license in the content itself? Of course, if I did, that means
> that in order to discover that copying was not permitted the reader would
> have to actually do the thing which is prohibited. Clearly, even if there
> was some way to put effective restrictive licenses in content, there would
> have to remain some "implied license" exceptions to the *all rights"
> provision of copyright.
> 	We are all best served by an assumption that copyright leaves "all
> rights" reserved to the publisher and that only "fair use," "limited implied
> license to syndicate," and "explicit license grants (like CC)" limit the
> totality of those rights. With this in mind it might be best to change from
> a "license" link to a "rights-grant" link... In other words, frame this link
> type as something which can *only* be used to broaden rights, not restrict
> them.
> 
> 	bob wyman
> 
> 
> 
> 




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From: Thomas Roessler <roessler@does-not-exist.org>
To: James M Snell <jasnell@gmail.com>
Cc: Bob Wyman <bob@wyman.us>, "'John Panzer'" <jpanzer@aol.net>, karl@w3.org,
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Subject: Re: atom license extension (Re: [cc-tab] *important* heads up)
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On 2006-09-08 08:21:59 -0700, James M Snell wrote:

> I think the discussion around this has been absolutely excellent.
> Lots of very good information and perspectives.  At this point I
> need to stew over things for a few days and think about how to
> proceed with the extension.

The last call for this spec is ending today...  I'm wondering a bit
what the next step (if any) between you and Lisa (as the shepherding
AD) needs to be in order to make sure that this goes as you intend
it to go.

-- 
Thomas Roessler   <roessler@does-not-exist.org>




From owner-atom-syntax@mail.imc.org Mon Sep 11 07:49:31 2006
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Date: Mon, 11 Sep 2006 12:27:12 +0100
From: James Aylett <james@tartarus.org>
To: atom-syntax@imc.org
Subject: Private extensions and relation to atom elements
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We've run across a situation where we want to annotate an atom:icon
with a title. Currently we're doing the following, as something that
Feed Validator is happy with, but doesn't feel right:

----------------------------------------------------------------------
  <atom:icon>uri:to/icon</atom:icon>
  <myns:icon-title xml:lang='en' xmlns:myns='...'>My icon
    title</myns:icon-title>
----------------------------------------------------------------------

It doesn't express the relationship directly. The way that would be
most natural in XML doesn't seem to be allowed (because we don't have
extension attributes):

----------------------------------------------------------------------
  <atom:icon myns:title='My icon title' ...>uri:to/icon</atom:icon>
----------------------------------------------------------------------

and all other ways I can think of involve extension elements in the
wrong place.

Anyone have another suggestion on how to approach this? Or would we be
better off adding our own <myns:icon/> which we can decorate with
titles, languages and whatever to our heart's content, even though
it's redundant to some extent?

James

-- 
/--------------------------------------------------------------------------\
  James Aylett                                                  xapian.org
  james@tartarus.org                               uncertaintydivision.org




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Subject: Re: atom license extension (Re: [cc-tab] *important* heads up)
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I talked with Lisa a bit about this next week.  I'll be working on
iterating the draft based on this conversation and will request another
last call once it's ready to go.

- James

Thomas Roessler wrote:
> On 2006-09-08 08:21:59 -0700, James M Snell wrote:
> 
>> I think the discussion around this has been absolutely excellent.
>> Lots of very good information and perspectives.  At this point I
>> need to stew over things for a few days and think about how to
>> proceed with the extension.
> 
> The last call for this spec is ending today...  I'm wondering a bit
> what the next step (if any) between you and Lisa (as the shepherding
> AD) needs to be in order to make sure that this goes as you intend
> it to go.
> 




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Subject: Re: Private extensions and relation to atom elements
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Using extension attributes is a perfectly legitimate solution.  The one
drawback is that not all implementations will support 'em.

- James

James Aylett wrote:
> We've run across a situation where we want to annotate an atom:icon
> with a title. Currently we're doing the following, as something that
> Feed Validator is happy with, but doesn't feel right:
> 
> ----------------------------------------------------------------------
>   <atom:icon>uri:to/icon</atom:icon>
>   <myns:icon-title xml:lang='en' xmlns:myns='...'>My icon
>     title</myns:icon-title>
> ----------------------------------------------------------------------
> 
> It doesn't express the relationship directly. The way that would be
> most natural in XML doesn't seem to be allowed (because we don't have
> extension attributes):
> 
> ----------------------------------------------------------------------
>   <atom:icon myns:title='My icon title' ...>uri:to/icon</atom:icon>
> ----------------------------------------------------------------------
> 
> and all other ways I can think of involve extension elements in the
> wrong place.
> 
> Anyone have another suggestion on how to approach this? Or would we be
> better off adding our own <myns:icon/> which we can decorate with
> titles, languages and whatever to our heart's content, even though
> it's redundant to some extent?
> 
> James
> 




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From: James Aylett <james@tartarus.org>
To: atom-syntax@imc.org
Subject: Re: Private extensions and relation to atom elements
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On Mon, Sep 11, 2006 at 07:27:27AM -0700, James M Snell wrote:

> Using extension attributes is a perfectly legitimate solution.  The one
> drawback is that not all implementations will support 'em.

That's not a problem, to be honest - we have (amongst other things) a
Flash 'player' for the atom feeds involved, and some clients want a
title alongside the feed icon and/or logo.

Feed Validator gets upset with extension attributes - is it wrong?

James

-- 
/--------------------------------------------------------------------------\
  James Aylett                                                  xapian.org
  james@tartarus.org                               uncertaintydivision.org




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Date: Mon, 11 Sep 2006 08:09:27 -0700
From: James M Snell <jasnell@gmail.com>
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Subject: Re: Private extensions and relation to atom elements
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atom:icon is defined as:

   atomIcon = element atom:icon {
      atomCommonAttributes,
      (atomUri)
   }

atomCommonAttributes is defined as:

   atomCommonAttributes =
      attribute xml:base { atomUri }?,
      attribute xml:lang { atomLanguageTag }?,
      undefinedAttribute*

The Validator should be ignoring any extensions (including attributes)
it is not familiar with so yes, I would say that it's wrong if its
returning an error.  A warning would be appropriate tho given that not
all implementations will be capable of making use of extension attributes.

One additional point, be sure to clearly define whether or not your
title attribute value should be interpreted as plain text or escaped
markup (preferably the former).

- James

James Aylett wrote:
> On Mon, Sep 11, 2006 at 07:27:27AM -0700, James M Snell wrote:
> 
>> Using extension attributes is a perfectly legitimate solution.  The one
>> drawback is that not all implementations will support 'em.
> 
> That's not a problem, to be honest - we have (amongst other things) a
> Flash 'player' for the atom feeds involved, and some clients want a
> title alongside the feed icon and/or logo.
> 
> Feed Validator gets upset with extension attributes - is it wrong?
> 
> James
> 




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From: James Aylett <james@tartarus.org>
To: atom-syntax@imc.org
Subject: Re: Private extensions and relation to atom elements
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On Mon, Sep 11, 2006 at 08:09:27AM -0700, James M Snell wrote:

> atom:icon is defined as:
> 
>    atomIcon = element atom:icon {
>       atomCommonAttributes,
>       (atomUri)
>    }
> 
> atomCommonAttributes is defined as:
> 
>    atomCommonAttributes =
>       attribute xml:base { atomUri }?,
>       attribute xml:lang { atomLanguageTag }?,
>       undefinedAttribute*

Hmm, I'd misunderstood what undefinedAttribute meant. Or, more likely,
missed it entirely. Thanks :)

> The Validator should be ignoring any extensions (including attributes)
> it is not familiar with so yes, I would say that it's wrong if its
> returning an error.  A warning would be appropriate tho given that not
> all implementations will be capable of making use of extension attributes.

Should the validator have different levels of warning? For instance,
it warns you if you have some iTunes extensions but not others; it
warns you if your RSS uses dates in a strange format that some readers
might not be able to parse; it should warn here. These are all
different: specific application may have problems; general
applications may have problems with a core feature; general
applications may ignore an extension.

(This isn't really the right forum for this, so apologies.)

> One additional point, be sure to clearly define whether or not your
> title attribute value should be interpreted as plain text or escaped
> markup (preferably the former).

Well, it's a private extension, so in practice you're not going to
know if we define it or not :-)

But yeah, point taken and I'll make sure it gets added to our spec
internally.

James

-- 
/--------------------------------------------------------------------------\
  James Aylett                                                  xapian.org
  james@tartarus.org                               uncertaintydivision.org




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Subject: Re: Private extensions and relation to atom elements
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On Sep 11, 2006, at 4:27 AM, James Aylett wrote:

>
> We've run across a situation where we want to annotate an atom:icon
> with a title. Currently we're doing the following, as something that
> Feed Validator is happy with, but doesn't feel right:
>
> ----------------------------------------------------------------------
>   <atom:icon>uri:to/icon</atom:icon>
>   <myns:icon-title xml:lang='en' xmlns:myns='...'>My icon
>     title</myns:icon-title>

let's assume myns: is declared.  Then why not

<icon myns:buddha-nature="high" myns:sizzle="low">icon-uri<icon>

  -Tim




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On Sep 11, 2006, at 7:45 AM, James Aylett wrote:

> Feed Validator gets upset with extension attributes - is it wrong?

Be specific, please?  -Tim




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On Mon, Sep 11, 2006 at 08:36:02AM -0700, Tim Bray wrote:

> let's assume myns: is declared.  Then why not
> 
> <icon myns:buddha-nature="high" myns:sizzle="low">icon-uri<icon>

Apologies to all - this is what we tried first, but there must have
been a typo or something, because the feed validator started shouting
at us. I've just checked again, and all is well.

Cheers,
James

-- 
/--------------------------------------------------------------------------\
  James Aylett                                                  xapian.org
  james@tartarus.org                               uncertaintydivision.org




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From: Jan Algermissen <algermissen1971@mac.com>
Subject: versioning extension?
Date: Tue, 12 Sep 2006 00:40:33 +0200
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Hi,

is anybody working on (or planning to work on) a versioning extension  
for Atom? I am about to use Atom in two (considerably different)  
projects that require versioning and would be happy to join forces  
and contribute real (enterprise-)world use cases. (Note: not  
'enterprisey' use cases :-)


Jan

  
  




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On Sep 11, 2006, at 3:40 PM, Jan Algermissen wrote:

> is anybody working on (or planning to work on) a versioning  
> extension for Atom? I am about to use Atom in two (considerably  
> different) projects that require versioning and would be happy to  
> join forces and contribute real (enterprise-)world use cases.  
> (Note: not 'enterprisey' use cases :-)

Eeeeeeeeeeeeeeeeeeeeeeek!  Flee for your lives!  *runs for the  
nearest exit*  -Tim




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On 12.09.2006, at 01:23, Tim Bray wrote:

> On Sep 11, 2006, at 3:40 PM, Jan Algermissen wrote:
>
>> is anybody working on (or planning to work on) a versioning  
>> extension for Atom? I am about to use Atom in two (considerably  
>> different) projects that require versioning and would be happy to  
>> join forces and contribute real (enterprise-)world use cases.  
>> (Note: not 'enterprisey' use cases :-)
>
> Eeeeeeeeeeeeeeeeeeeeeeek!  Flee for your lives!  *runs for the  
> nearest exit*  -Tim

Umm...am I missing  something? Is it that bad?

What I am basically aiming at is a common means to relate entries to  
each other to indicate one is a version of the other or to link from  
an entry to a feed that consists of versions of that entry,

If I am not completely wrong, versioning is definitely an issue if  
you want to employ Atom in beyond-blogging contexts. Most people that  
deal with collections of items are definitely interested in keeping  
track of the former versions of the items.

What is so bad about it?

Jan




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Subject: Re: versioning extension?
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Le 12 sept. 06 =E0 08:39, Jan Algermissen a =E9crit :
> Umm...am I missing  something? Is it that bad?
>
> What I am basically aiming at is a common means to relate entries =20
> to each other to indicate one is a version of the other or to link =20
> from an entry to a feed that consists of versions of that entry,
>
> If I am not completely wrong, versioning is definitely an issue if =20
> you want to employ Atom in beyond-blogging contexts. Most people =20
> that deal with collections of items are definitely interested in =20
> keeping track of the former versions of the items.

Are you talking about threading?

Why not putting it outside of Atom and use the power of links for =20
threading.
Similar discussion but for comments happened on microformats ML.


So IMHO, it is slightly off-topic, in the sense you could achieve it =20
by an application built on top of Atom without touching Atom
AND Tim Bray could come back in the room :p


 From the microformats ML

Le 12 sept. 06 =E0 08:35, Karl Dubost a =E9crit :
> Hi Steph,
>
> Le 12 sept. 06 =E0 07:17, Stephanie Booth (bunny) a =E9crit :
>> A while back somebody showed me a blog marked up with hatom. That
>> person used hatom on the comments too (on the single post page) --
>> that meant two hfeeds: one containing only the post, and another one
>> with the comments.
>>
>> Does this way of using hatom on comments make sense to you? I noticed
>> that neither K2 nor Sandbox wordpress themes do this.
>
> Completely logical.
>
> Each individual comment is nothing more than a weblog post.
> The only technical difference is that it is not made on another =20
> weblog, but directly on the weblog of the person.
>
> Each individual comment is structured like a weblog post.
> It has  (required)
> 	- an id, the URI of the comment
> 	- a title, often the same than the original weblog post, sometimes =20
> a different (see SPIP)
> 	- a date when it has been done (updated)
> It has (recommended)
> 	- often an author
> 	- content (core text of the comment)
> 	- link (the URI of the Weblog original post we are commenting on)
>
> It just miss a summary, but that is not mandatory in Atom either.
>
> IMHO, it should be an individual hatom entry for each comment, The =20
> way everything is aggregated and organized has a full feed is =20
> another debate. The date and link should help to create a pseudo =20
> thread.
> It could be a full thread like in SPIP when the commenter has the =20
> possibility to reply to a specific comment in this case the link =20
> becomes the URI of the specific comment.
>





--=20
Karl Dubost - http://www.w3.org/People/karl/
W3C Conformance Manager, QA Activity Lead
   QA Weblog - http://www.w3.org/QA/
      *** Be Strict To Be Cool ***






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On Sep 11, 2006, at 4:39 PM, Jan Algermissen wrote:

> If I am not completely wrong, versioning is definitely an issue if =20
> you want to employ Atom in beyond-blogging contexts. Most people =20
> that deal with collections of items are definitely interested in =20
> keeping track of the former versions of the items.

Versioning is an issue in almost *every* application.

> What is so bad about it?

In my experience, the semantics of "versioning" are so tightly bound =20
to particular applications that it's really hard to find common =20
threads.  You saw that happen here when we were arguing about =20
atom:updated, Asbj=F8rn had a particular vision of versions that seemed =20
obvious to him and unreasonable to others.  When a textbook publisher =20
and a medical-instrument embedded-software maker and a wiki =20
implementor use the word "version", I guarantee you they mean =20
entirely different and wildly incompatible things.

Good luck; you'll need it. -Tim




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 Karl,

On Tuesday, September 12, 2006, at 02:37AM, Karl Dubost <karl@w3.org> wro=
te:

>
>
>Le 12 sept. 06 =E0 08:39, Jan Algermissen a =E9crit :
>> Umm...am I missing  something? Is it that bad?
>>
>> What I am basically aiming at is a common means to relate entries =20
>> to each other to indicate one is a version of the other or to link =20
>> from an entry to a feed that consists of versions of that entry,
>>
>> If I am not completely wrong, versioning is definitely an issue if =20
>> you want to employ Atom in beyond-blogging contexts. Most people =20
>> that deal with collections of items are definitely interested in =20
>> keeping track of the former versions of the items.
>
>Are you talking about threading?

I did consider re-using threading, but thought the semantics are really t=
o different. OTH, I did not take an in depth look, so maybe there is an e=
ntry-to-entry relationship that can be re-used.

>
>Why not putting it outside of Atom and use the power of links for =20
>threading.

I really did not have a modification to atom in mind (maybe I used the na=
me 'extension' improperly). I was only looking for a relatively standardi=
zed way to link items to derived items or vice versa.

BTW: Can the cotent of an atom enry contain or link to an atom feed docum=
ent?

Thanks.

Jan


>Similar discussion but for comments happened on microformats ML.
>
>
>So IMHO, it is slightly off-topic, in the sense you could achieve it =20
>by an application built on top of Atom without touching Atom
>AND Tim Bray could come back in the room :p
>
>
> From the microformats ML
>
>Le 12 sept. 06 =E0 08:35, Karl Dubost a =E9crit :
>> Hi Steph,
>>
>> Le 12 sept. 06 =E0 07:17, Stephanie Booth (bunny) a =E9crit :
>>> A while back somebody showed me a blog marked up with hatom. That
>>> person used hatom on the comments too (on the single post page) --
>>> that meant two hfeeds: one containing only the post, and another one
>>> with the comments.
>>>
>>> Does this way of using hatom on comments make sense to you? I noticed
>>> that neither K2 nor Sandbox wordpress themes do this.
>>
>> Completely logical.
>>
>> Each individual comment is nothing more than a weblog post.
>> The only technical difference is that it is not made on another =20
>> weblog, but directly on the weblog of the person.
>>
>> Each individual comment is structured like a weblog post.
>> It has  (required)
>> 	- an id, the URI of the comment
>> 	- a title, often the same than the original weblog post, sometimes =20
>> a different (see SPIP)
>> 	- a date when it has been done (updated)
>> It has (recommended)
>> 	- often an author
>> 	- content (core text of the comment)
>> 	- link (the URI of the Weblog original post we are commenting on)
>>
>> It just miss a summary, but that is not mandatory in Atom either.
>>
>> IMHO, it should be an individual hatom entry for each comment, The =20
>> way everything is aggregated and organized has a full feed is =20
>> another debate. The date and link should help to create a pseudo =20
>> thread.
>> It could be a full thread like in SPIP when the commenter has the =20
>> possibility to reply to a specific comment in this case the link =20
>> becomes the URI of the specific comment.
>>
>
>
>
>
>
>--=20
>Karl Dubost - http://www.w3.org/People/karl/
>W3C Conformance Manager, QA Activity Lead
>   QA Weblog - http://www.w3.org/QA/
>      *** Be Strict To Be Cool ***
>
>
>
>
>


------------------------------------------------------------
Jan Algermissen                                               http://jalg=
ermissen.com
Software Architect                                            http://www.=
tugboat.de





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Jan Algermissen wrote:
> is anybody working on (or planning to work on) a versioning extension 
> for Atom? I am about to use Atom in two (considerably different) 
> projects that require versioning and would be happy to join forces and 
> contribute real (enterprise-)world use cases. (Note: not 'enterprisey' 
> use cases :-)

Maybe dcterms:isVersionOf and dcterms:hasVersion fit your bill [1]. 
Granted, their definition is rather loose (as most of Dublincore's 
definition are -- by design), but that only means that those terms might 
work in both of your use cases. If so, using an established metadata 
vocabulary like Dublincore is definitely worth considering.

I hope that helps,

Andreas Sewe

[1] <http://dublincore.org/documents/dcmi-terms/#H3>




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2006/9/12, Jan Algermissen:
> is anybody working on (or planning to work on) a versioning extension
> for Atom? I am about to use Atom in two (considerably different)
> projects that require versioning and would be happy to join forces
> and contribute real (enterprise-)world use cases. (Note: not
> 'enterprisey' use cases :-)

Have you looked at this?
http://tools.ietf.org/wg/atompub/draft-snell-atompub-revision-00.txt

-- 
Thomas Broyer




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--NextPart

A New Internet-Draft is available from the on-line Internet-Drafts 
directories.
This draft is a work item of the Atom Publishing Format and Protocol Working Group of the IETF.

	Title		: The Atom Publishing Protocol
	Author(s)	: B. de Hora, J. Gregorio
	Filename	: draft-ietf-atompub-protocol-10.txt
	Pages		: 51
	Date		: 2006-9-12
	
The Atom Publishing Protocol (APP) is an application-level protocol
for publishing and editing Web resources.  The protocol is based on
HTTP transport of Atom-formatted representations.  The Atom format is
documented in the Atom Syndication Format (RFC4287).

A URL for this Internet-Draft is:
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From: Jan Algermissen <algermissen1971@mac.com>
Subject: Atom Revisions (was versioning extension?)
Date: Tue, 12 Sep 2006 22:25:07 +0200
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On 12.09.2006, at 11:44, Thomas Broyer wrote:

>
> 2006/9/12, Jan Algermissen:
>> is anybody working on (or planning to work on) a versioning extension
>> for Atom? I am about to use Atom in two (considerably different)
>> projects that require versioning and would be happy to join forces
>> and contribute real (enterprise-)world use cases. (Note: not
>> 'enterprisey' use cases :-)
>
> Have you looked at this?
> http://tools.ietf.org/wg/atompub/draft-snell-atompub-revision-00.txt

James

quick question about your draft:

You write:

------------------------------------------------------------------------ 
-------------------------
13.  The 'next-revision' Link Relation

    Atom entry elements MAY contain an atom:link element with a rel
    attribute value of 'next-revision' whose href attribute specifies  
the
    URI of an Atom Entry Document representing the subsequent version of
    the entry.
------------------------------------------------------------------------ 
-------------------------

Is there an intention behind the use of the phrase '*the* subsequent  
version' to rule out version trees (where next-revision would point  
to *a* subsequent revision of potentially many)?

Thanks,
Jan





>
> -- 
> Thomas Broyer
>




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Hey Jan,

No, the text should read "a subsequent version".

Also, keep in mind that this draft was put out there for purely
experimental purposes.  It hasn't been updated and likely won't be
unless there is significant interest.

- James

Jan Algermissen wrote:
> [snip]
> James
> 
> quick question about your draft:
> 
> You write:
> 
> -------------------------------------------------------------------------------------------------
> 
> 13.  The 'next-revision' Link Relation
> 
>    Atom entry elements MAY contain an atom:link element with a rel
>    attribute value of 'next-revision' whose href attribute specifies the
>    URI of an Atom Entry Document representing the subsequent version of
>    the entry.
> -------------------------------------------------------------------------------------------------
> 
> 
> Is there an intention behind the use of the phrase '*the* subsequent
> version' to rule out version trees (where next-revision would point to
> *a* subsequent revision of potentially many)?
> 
> Thanks,
> Jan
> 
> 
> 
> 
> 
>>
>> --Thomas Broyer
>>
> 
> 




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On Sep 12, 2006, at 1:23 PM, Joe Gregorio wrote:

>
> FYI

And of course there's an HTML version at http://bitworking.org/ 
projects/atom/

   -Tim





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Cc: Jan Algermissen <algermissen1971@mac.com>, atom-syntax@imc.org
From: Lisa Dusseault <lisa@osafoundation.org>
Subject: Re: versioning extension?
Date: Wed, 13 Sep 2006 13:13:55 -0700
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On Sep 11, 2006, at 5:20 PM, Tim Bray wrote:

> Versioning is an issue in almost *every* application.
>
>> What is so bad about it?
>
> In my experience, the semantics of "versioning" are so tightly =20
> bound to particular applications that it's really hard to find =20
> common threads.  You saw that happen here when we were arguing =20
> about atom:updated, Asbj=F8rn had a particular vision of versions =20
> that seemed obvious to him and unreasonable to others.  When a =20
> textbook publisher and a medical-instrument embedded-software maker =20=

> and a wiki implementor use the word "version", I guarantee you they =20=

> mean entirely different and wildly incompatible things.
>
> Good luck; you'll need it. -Tim
>

I concur with the word of warning (which shouldn't be construed as =20
anything more than an individual offering up their experience for =20
what that's worth).  Check out RFC3253, DeltaV -- in order to get =20
anything published, it had to have a ton of optional features which =20
makes it difficult to write general DeltaV clients that interoperate =20
against multiple servers.  I haven't heard of any such clients yet!

Lisa=

--Apple-Mail-3--517391001
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<HTML><BODY style=3D"word-wrap: break-word; -khtml-nbsp-mode: space; =
-khtml-line-break: after-white-space; "><BR><DIV><DIV>On Sep 11, 2006, =
at 5:20 PM, Tim Bray wrote:</DIV><BR =
class=3D"Apple-interchange-newline"><BLOCKQUOTE type=3D"cite"><P =
style=3D"margin: 0.0px 0.0px 0.0px 0.0px"><FONT face=3D"Helvetica" =
size=3D"3" style=3D"font: 12.0px Helvetica">Versioning is an issue in =
almost *every* application.</FONT></P> <P style=3D"margin: 0.0px 0.0px =
0.0px 0.0px; font: 12.0px Helvetica; min-height: 14.0px"><BR></P> =
<BLOCKQUOTE type=3D"cite"><P style=3D"margin: 0.0px 0.0px 0.0px =
10.0px"><FONT face=3D"Helvetica" size=3D"3" style=3D"font: 12.0px =
Helvetica">What is so bad about it?</FONT></P> </BLOCKQUOTE><P =
style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica; =
min-height: 14.0px"><BR></P> <P style=3D"margin: 0.0px 0.0px 0.0px =
0.0px"><FONT face=3D"Helvetica" size=3D"3" style=3D"font: 12.0px =
Helvetica">In my experience, the semantics of "versioning" are so =
tightly bound to particular applications that it's really hard to find =
common threads.<SPAN class=3D"Apple-converted-space">=A0 </SPAN>You saw =
that happen here when we were arguing about atom:updated, Asbj=F8rn had =
a particular vision of versions that seemed obvious to him and =
unreasonable to others.<SPAN class=3D"Apple-converted-space">=A0 =
</SPAN>When a textbook publisher and a medical-instrument =
embedded-software maker and a wiki implementor use the word "version", I =
guarantee you they mean entirely different and wildly incompatible =
things.</FONT></P> <P style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: =
12.0px Helvetica; min-height: 14.0px"><BR></P> <P style=3D"margin: 0.0px =
0.0px 0.0px 0.0px"><FONT face=3D"Helvetica" size=3D"3" style=3D"font: =
12.0px Helvetica">Good luck; you'll need it. -Tim</FONT></P> <P =
style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica; =
min-height: 14.0px"><BR></P> </BLOCKQUOTE></DIV><BR><DIV>I concur with =
the word of warning (which shouldn't be construed as anything more than =
an individual offering up their experience for what that's worth).=A0 =
Check out RFC3253, DeltaV -- in order to get anything published, it had =
to have a ton of optional features which makes it difficult to write =
general DeltaV clients that interoperate against multiple servers.=A0 I =
haven't heard of any such clients yet!</DIV><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV>Lisa</DIV></BODY></HTML>=

--Apple-Mail-3--517391001--




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From: Jan Algermissen <algermissen1971@mac.com>
Subject: Re: versioning extension?
Date: Wed, 13 Sep 2006 23:50:02 +0200
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Lisa,


On 13.09.2006, at 22:13, Lisa Dusseault wrote:

> I concur with the word of warning (which shouldn't be construed as  
> anything more than an individual offering up their experience for  
> what that's worth).  Check out RFC3253, DeltaV -- in order to get  
> anything published, it had to have a ton of optional features which  
> makes it difficult to write general DeltaV clients that  
> interoperate against multiple servers.  I haven't heard of any such  
> clients yet.

Yes, I see. OTH, I am not looking for an extension that is directed  
towards providing a versioning repository to Atom clients, but merely  
for a way for an atom server to communicate that versions exist.

I think from the client interaction POV, versioning should be  
transparent. If the server creates a new version upon an update (or  
redirects the PUT in the first place) should not be of concern to the  
client.

But telling the client that there *are* versions of an entry  
available seems rather straightforward (see James' draft)

Jan


> Lisa




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Lisa Dusseault schrieb:
> I concur with the word of warning (which shouldn't be construed as 
> anything more than an individual offering up their experience for what 
> that's worth).  Check out RFC3253, DeltaV -- in order to get anything 
> published, it had to have a ton of optional features which makes it 
> difficult to write general DeltaV clients that interoperate against 
> multiple servers.  I haven't heard of any such clients yet!

Well, DeltaV also defines a simple core module, and, as far as I can 
tell, this is completely interoperable between clients that support it 
(Xythos, SAP KM), and servers that advertise RFC3253 support (again: SAP 
KM and Xythos, and also Slide).

Best regards, Julian




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With the publication of draft-ietf-atompub-protocol-10.txt, we are 
ready for WG Last Call. This is a two-week period where people look 
intently at the document and comment on it.  New Paces are still 
allowed, and are encouraged if you are proposing anything more than a 
few sentences worth of change.  

At the end of the Last Call, we grind out one last revision, and the 
WG passes it on to our fearless AD to take it to the IETF as a whole.

The WG Last Call will close September 26.

Please remember to make your subject lines meaningful when you start 
threads, and when you change the topic. Thanks!




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What are we going to do with the Security Considerations?  We had two
paces on the table. Robert withdrew his. I made some edits to mine.  At
this point, my Pace is the only one still on the table.

- James

Paul Hoffman wrote:
> 
> With the publication of draft-ietf-atompub-protocol-10.txt, we are ready
> for WG Last Call. This is a two-week period where people look intently
> at the document and comment on it.  New Paces are still allowed, and are
> encouraged if you are proposing anything more than a few sentences worth
> of change. 
> At the end of the Last Call, we grind out one last revision, and the WG
> passes it on to our fearless AD to take it to the IETF as a whole.
> 
> The WG Last Call will close September 26.
> 
> Please remember to make your subject lines meaningful when you start
> threads, and when you change the topic. Thanks!
> 
> 




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Just a procedural nit:

At 02:13 06/09/15, Paul Hoffman wrote:

>The WG Last Call will close September 26.

Your email is dated as follows: Date: Thu, 14 Sep 2006 10:13:13 -0700.

When last counting, two weeks were fourteen days. That would make
the closure date of WG Last Call September 28th. Or did I get anything wrong?

Regards,    Martin.



#-#-#  Martin J. Du"rst, Assoc. Professor, Aoyama Gakuin University
#-#-#  http://www.sw.it.aoyama.ac.jp       mailto:duerst@it.aoyama.ac.jp     




From tours-training@freenet.de Fri Sep 15 00:34:48 2006
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At 11:54 AM +0900 9/15/06, Martin Duerst wrote:
>When last counting, two weeks were fourteen days. That would make
>the closure date of WG Last Call September 28th. Or did I get anything wrong?

You got wrong the fact that the WG started discussing the draft two 
days ago. WG Last Call is as long as is needed, and we thought that 
about two weeks was needed.




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From: Mark Nottingham <mnot@mnot.net>
Subject: Fwd: I-D ACTION:draft-nottingham-atompub-feed-history-07.txt 
Date: Mon, 18 Sep 2006 06:56:57 -0700
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Feed History is now Feed Paging and Archiving, to reflect what it's  
become.

This draft is mostly a cleanup of -06, incorporating all of the  
feedback I've seen to date (thanks to all). If I missed anyone's  
comments (or an acknowledgment), please point it out.

The only substantial change is to archive document stability, which  
was demoted from MUST to SHOULD, as discussed.

A diff can be found at:
   <http://ietfreport.isoc.org/cgi-bin/htmlwdiff?f1=../all/ids/draft- 
nottingham-atompub-feed-history-07.txt&f2=../all/ids/draft-nottingham- 
atompub-feed-history-06.txt>

Barring any last-minute show-stoppers, I intend to request this draft  
to be put on the Standards Track.

As always, comments, corrections and suggestions appreciated (but I  
hope we're done!)

Cheers,


Begin forwarded message:

> From: Internet-Drafts@ietf.org
> Date: 15 September 2006 12:50:02 PM
> To: i-d-announce@ietf.org
> Subject: I-D ACTION:draft-nottingham-atompub-feed-history-07.txt
> Reply-To: internet-drafts@ietf.org
>
> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
>
>
> 	Title		: Feed Paging and Archiving
> 	Author(s)	: M. Nottingham
> 	Filename	: draft-nottingham-atompub-feed-history-07.txt
> 	Pages		: 16
> 	Date		: 2006-9-15
> 	
> This specification defines three types of syndicated feeds that
>    enable publication of entries across one or more feed documents.
>
> A URL for this Internet-Draft is:
> http://www.ietf.org/internet-drafts/draft-nottingham-atompub-feed- 
> history-07.txt
>
> To remove yourself from the I-D Announcement list, send a message to
> i-d-announce-request@ietf.org with the word unsubscribe in the body of
> the message.
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> logging in, type "cd internet-drafts" and then
> "get draft-nottingham-atompub-feed-history-07.txt".
>
> A list of Internet-Drafts directories can be found in
> http://www.ietf.org/shadow.html
> or ftp://ftp.ietf.org/ietf/1shadow-sites.txt
>
> Internet-Drafts can also be obtained by e-mail.
>
> Send a message to:
> 	mailserv@ietf.org.
> In the body type:
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> 	
> NOTE:	The mail server at ietf.org can return the document in
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--
Mark Nottingham     http://www.mnot.net/




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From: Mark Nottingham <mnot@mnot.net>
Subject: Fwd: I-D ACTION:draft-nottingham-atompub-feed-history-07.txt 
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Feed History is now Feed Paging and Archiving, to reflect what it's  
become.

This draft is mostly a cleanup of -06, incorporating all of the  
feedback I've seen to date (thanks to all). If I missed anyone's  
comments (or an acknowledgment), please point it out.

The only substantial change is to archive document stability, which  
was demoted from MUST to SHOULD, as discussed.

A diff can be found at:
   <http://ietfreport.isoc.org/cgi-bin/htmlwdiff?f1=../all/ids/draft- 
nottingham-atompub-feed-history-07.txt&f2=../all/ids/draft-nottingham- 
atompub-feed-history-06.txt>

Barring any last-minute show-stoppers, I intend to request this draft  
to be put on the Standards Track.

As always, comments, corrections and suggestions appreciated (but I  
hope we're done!)

Cheers,


Begin forwarded message:

> From: Internet-Drafts@ietf.org
> Date: 15 September 2006 12:50:02 PM
> To: i-d-announce@ietf.org
> Subject: I-D ACTION:draft-nottingham-atompub-feed-history-07.txt
> Reply-To: internet-drafts@ietf.org
>
> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
>
>
> 	Title		: Feed Paging and Archiving
> 	Author(s)	: M. Nottingham
> 	Filename	: draft-nottingham-atompub-feed-history-07.txt
> 	Pages		: 16
> 	Date		: 2006-9-15
> 	
> This specification defines three types of syndicated feeds that
>    enable publication of entries across one or more feed documents.
>
> A URL for this Internet-Draft is:
> http://www.ietf.org/internet-drafts/draft-nottingham-atompub-feed- 
> history-07.txt
>
> To remove yourself from the I-D Announcement list, send a message to
> i-d-announce-request@ietf.org with the word unsubscribe in the body of
> the message.
> You can also visit https://www1.ietf.org/mailman/listinfo/I-D-announce
> to change your subscription settings.
>
> Internet-Drafts are also available by anonymous FTP. Login with the
> username "anonymous" and a password of your e-mail address. After
> logging in, type "cd internet-drafts" and then
> "get draft-nottingham-atompub-feed-history-07.txt".
>
> A list of Internet-Drafts directories can be found in
> http://www.ietf.org/shadow.html
> or ftp://ftp.ietf.org/ietf/1shadow-sites.txt
>
> Internet-Drafts can also be obtained by e-mail.
>
> Send a message to:
> 	mailserv@ietf.org.
> In the body type:
> 	"FILE /internet-drafts/draft-nottingham-atompub-feed-history-07.txt".
> 	
> NOTE:	The mail server at ietf.org can return the document in
> 	MIME-encoded form by using the "mpack" utility.  To use this
> 	feature, insert the command "ENCODING mime" before the "FILE"
> 	command.  To decode the response(s), you will need "munpack" or
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> 	exhibit different behavior, especially when dealing with
> 	"multipart" MIME messages (i.e. documents which have been split
> 	up into multiple messages), so check your local documentation on
> 	how to manipulate these messages.
>
> Below is the data which will enable a MIME compliant mail reader
> implementation to automatically retrieve the ASCII version of the
> Internet-Draft.
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> Content-ID: <2006-9-15131244.I-D@ietf.org>
>
> _______________________________________________
> I-D-Announce mailing list
> I-D-Announce@ietf.org
> https://www1.ietf.org/mailman/listinfo/i-d-announce


--
Mark Nottingham     http://www.mnot.net/




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From: Stefan Eissing <stefan.eissing@greenbytes.de>
Subject: Re: I-D ACTION:draft-nottingham-atompub-feed-history-07.txt 
Date: Wed, 20 Sep 2006 13:51:46 +0200
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Looks fine to me.

Cheers,

Stefan

Am 18.09.2006 um 15:56 schrieb Mark Nottingham:

>
> Feed History is now Feed Paging and Archiving, to reflect what it's  
> become.
>
> This draft is mostly a cleanup of -06, incorporating all of the  
> feedback I've seen to date (thanks to all). If I missed anyone's  
> comments (or an acknowledgment), please point it out.
>
> The only substantial change is to archive document stability, which  
> was demoted from MUST to SHOULD, as discussed.
>
> A diff can be found at:
>   <http://ietfreport.isoc.org/cgi-bin/htmlwdiff?f1=../all/ids/draft- 
> nottingham-atompub-feed-history-07.txt&f2=../all/ids/draft- 
> nottingham-atompub-feed-history-06.txt>
>
> Barring any last-minute show-stoppers, I intend to request this  
> draft to be put on the Standards Track.
>
> As always, comments, corrections and suggestions appreciated (but I  
> hope we're done!)
>
> Cheers,
>
>
> Begin forwarded message:
>
>> From: Internet-Drafts@ietf.org
>> Date: 15 September 2006 12:50:02 PM
>> To: i-d-announce@ietf.org
>> Subject: I-D ACTION:draft-nottingham-atompub-feed-history-07.txt
>> Reply-To: internet-drafts@ietf.org
>>
>> A New Internet-Draft is available from the on-line Internet-Drafts
>> directories.
>>
>>
>> 	Title		: Feed Paging and Archiving
>> 	Author(s)	: M. Nottingham
>> 	Filename	: draft-nottingham-atompub-feed-history-07.txt
>> 	Pages		: 16
>> 	Date		: 2006-9-15
>> 	
>> This specification defines three types of syndicated feeds that
>>    enable publication of entries across one or more feed documents.
>>
>> A URL for this Internet-Draft is:
>> http://www.ietf.org/internet-drafts/draft-nottingham-atompub-feed- 
>> history-07.txt
>>
>> To remove yourself from the I-D Announcement list, send a message to
>> i-d-announce-request@ietf.org with the word unsubscribe in the  
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>> announce
>> to change your subscription settings.
>>
>> Internet-Drafts are also available by anonymous FTP. Login with the
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>> logging in, type "cd internet-drafts" and then
>> "get draft-nottingham-atompub-feed-history-07.txt".
>>
>> A list of Internet-Drafts directories can be found in
>> http://www.ietf.org/shadow.html
>> or ftp://ftp.ietf.org/ietf/1shadow-sites.txt
>>
>> Internet-Drafts can also be obtained by e-mail.
>>
>> Send a message to:
>> 	mailserv@ietf.org.
>> In the body type:
>> 	"FILE /internet-drafts/draft-nottingham-atompub-feed- 
>> history-07.txt".
>> 	
>> NOTE:	The mail server at ietf.org can return the document in
>> 	MIME-encoded form by using the "mpack" utility.  To use this
>> 	feature, insert the command "ENCODING mime" before the "FILE"
>> 	command.  To decode the response(s), you will need "munpack" or
>> 	a MIME-compliant mail reader.  Different MIME-compliant mail readers
>> 	exhibit different behavior, especially when dealing with
>> 	"multipart" MIME messages (i.e. documents which have been split
>> 	up into multiple messages), so check your local documentation on
>> 	how to manipulate these messages.
>>
>> Below is the data which will enable a MIME compliant mail reader
>> implementation to automatically retrieve the ASCII version of the
>> Internet-Draft.
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>>
>> _______________________________________________
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>
>
> --
> Mark Nottingham     http://www.mnot.net/
>




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Date: Mon, 25 Sep 2006 22:11:50 -0700
From: James M Snell <jasnell@gmail.com>
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FYI... The Atom Threading Extensions are now RFC 4685.

- James




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Subject: Re: Atom Threading Extensions, RFC 4685
From: "Sylvain Hellegouarch" <sh@defuze.org>
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>
> FYI... The Atom Threading Extensions are now RFC 4685.
>
> - James
>

Congrats James for this extension :D

- Sylvain




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Subject: Re: WG Last Call for draft-ietf-atompub-protocol
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Paul Hoffman wrote:
> 
> The WG Last Call will close September 26.

Here's a list of Paces that weren't disposed of with the last consensus 
call:

PaceAppEdited
PaceAppEdited2
PaceAppModified3
PaceAppVersion
PaceCollectionLinkType
PaceFixModel
PaceLocationPointsToEntry
PaceOrderCollectionsByAppModified2
PaceRemoveConnegSuggestionOnServiceDoc
PaceRemoveOutOfLineCategoriesFromCategoryDocument
PaceRevertTitle
PaceSecurityConsiderationsRevised
PaceServiceLinkType
UseElementsForAppCollectionTitles2
UseElementsForAppCollectionTitles3

- Sam Ruby




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Date: Tue, 26 Sep 2006 15:15:11 -0700
From: Tim Bray <tbray@textuality.com>
Subject: Re: WG Last Call for draft-ietf-atompub-protocol
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On Sep 26, 2006, at 12:34 PM, Sam Ruby wrote:

> Here's a list of Paces that weren't disposed of with the last  
> consensus call:

First of all, did Sam get them all?  Please speak up soonest about  
anything that was missed and might have a realistic chance.

<co-chair-mode>

PaceAppEdited: Lots of discussion.  There seems universal support for  
the utility of an app:edited element, and an assertion that entry  
members SHOULD contain one.  On the other hand, every discussion of  
sort order has spiraled instantly into a rat-hole.

Conclusion.  PaceAppEdited is accepted, in part. The second part of  
the proposal, defining the app:edited element, is ACCEPTED.  The  
first part, imposing a requirement on the sort order of collections,  
clearly does not have consensus support.

======================================================================== 
=

PaceAppEdited2: Not enough support, some opposition, big and  
complicated.  REJECTED.

======================================================================== 
=

PaceAppModified3: Lots of discussion, no real consensus, eventually  
replaced by PaceAppEdited.  REJECTED.

======================================================================== 
=

PaceAppVersion: Got no +1s, some opposition: REJECTED.

======================================================================== 
=

PaceCollectionLinkType: zero discussion: REJECTED.

======================================================================== 
=

PaceFixModel: 2 supporters, not enough: REJECTED.
But note that this is inconsistent with some of the language in  
section 9, so editorial work is required.

======================================================================== 
=

PaceLocationPointsToEntry: zero discussion: REJECTED.

======================================================================== 
=

PaceOrderCollectionsByAppModified2: zero discussion: REJECTED.

======================================================================== 
=

PaceRemoveConnegSuggestionOnServiceDoc: almost no discussion: REJECTED.

======================================================================== 
=

PaceRemoveOutOfLineCategoriesFromCategoryDocument: 2 supporters,  
little discussion, not enough.  REJECTED.

======================================================================== 
=

PaceRevertTitle: Lots of -1's: REJECTED.

======================================================================== 
=

PaceSecurityConsiderationsRevised: We need something in the Security  
Considerations section of the document, and there was at least some  
support for the ideas in this section in the past. The other proposal  
for words for this section was withdrawn. Therefore, this Pace is  
ACCEPTED with the understanding that the issue of what our security  
considerations are is not closed and may be modified after the IETF  
last call.

======================================================================== 
=

PaceServiceLinkType: Not enough discussion/support: REJECTED.

======================================================================== 
=

UseElementsForAppCollectionTitles3: Seems to have been incorporated  
in the draft.

</co-chair-mode>







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On 27/9/06 8:15 AM, "Tim Bray" <tbray@textuality.com> wrote:

> PaceAppEdited: Lots of discussion.  There seems universal support for
> the utility of an app:edited element, and an assertion that entry
> members SHOULD contain one.  On the other hand, every discussion of
> sort order has spiraled instantly into a rat-hole.
>=20
> Conclusion.  PaceAppEdited is accepted, in part. The second part of
> the proposal, defining the app:edited element, is ACCEPTED.  The
> first part, imposing a requirement on the sort order of collections,
> clearly does not have consensus support.

There also seems to be universal support for the notion that collection
feeds could be sorted by something other than what's currently in the spe=
c.
The spec currently not only says collections are to be sorted by
atom:updated, but because of the MUST it also says it MUST NOT be sorted =
by
anything *else*, which is a problem.

Section 10.0 =B6 2 says this:

    The entries in the returned Atom Feed MUST be ordered by their
   "atom:updated" property, with the most recently updated entries
    coming first in the document order. Clients SHOULD be constructed
    in consideration of the fact that changes which do not alter the
    atom:updated value of an entry will not affect the position of
    the entry in a Collection.

We need to either strike that entire paragraph, or at the very least make
that MUST into a SHOULD.

I say +1 to s/MUST/SHOULD/

e.





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Subject: RFC 4685 on Atom Threading Extensions
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A new Request for Comments is now available in online RFC libraries.


         RFC 4685

         Title:      Atom Threading Extensions
         Author:     J. Snell
         Status:     Standards Track
         Date:       September 2006
         Mailbox:    jasnell@gmail.com
         Pages:      12
         Characters: 24403
         Updates/Obsoletes/SeeAlso:   None

         I-D Tag:    draft-snell-atompub-feed-thread-12.txt

         URL:        http://www.rfc-editor.org/rfc/rfc4685.txt

This memo presents a mechanism that allows feeds publishers to
express threaded discussions within the Atom Syndication Format.
[STANDARDS TRACK]

This is now a Proposed Standard Protocol.

STANDARDS TRACK: This document specifies an Internet standards track
protocol for the Internet community,and requests discussion and
suggestions for improvements.Please refer to the current edition of the
Internet Official Protocol Standards (STD 1) for the standardization
state and status of this protocol.  Distribution of this memo is
unlimited.

This announcement is sent to the IETF list and the RFC-DIST list.
Requests to be added to or deleted from the IETF distribution list
should be sent to IETF-REQUEST@IETF.ORG.  Requests to be
added to or deleted from the RFC-DIST distribution list should
be sent to RFC-DIST-REQUEST@RFC-EDITOR.ORG.

Details on obtaining RFCs via FTP or EMAIL may be obtained by sending
an EMAIL message to rfc-info@RFC-EDITOR.ORG with the message body

help: ways_to_get_rfcs. For example:

         To: rfc-info@RFC-EDITOR.ORG
         Subject: getting rfcs

         help: ways_to_get_rfcs

Requests for special distribution should be addressed to either the
author of the RFC in question, or to RFC-Manager@RFC-EDITOR.ORG.  Unless
specifically noted otherwise on the RFC itself, all RFCs are for
unlimited distribution.

Submissions for Requests for Comments should be sent to
RFC-EDITOR@RFC-EDITOR.ORG.  Please consult RFC 2223, Instructions to RFC
Authors, for further information.


Joyce K. Reynolds and Sandy Ginoza
USC/Information Sciences Institute

...



_______________________________________________
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Subject: Atom Export
Date: Wed, 27 Sep 2006 21:21:07 +1000
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Hello Atom folks,

Here is a proposal for an Atom-derived format for exporting of content.

The problem I'm trying to solve is that of migration from one  
authoring system (eg blogging engine) to another. Atom is highly  
suited to this task.

The full problem statement, and the reasons for basing the solution  
on Atom, are all described in the proposal published here:

http://girtby.net/offerings/atomexport

There is no implementation yet.

I look forward to your comments on this document.




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<co-chair-mode>
Please see the dialogue below.
</co-chair-mode>

(Eric's point seems plausible to me; personally I'd be inclined to a =20
+1.)

<co-chair-mode>
Can we have some feedback from the WG ASAP?  We want to take =20
protocol-11 to the IETF.
</co-chair-mode>

   -Tim

On Sep 26, 2006, at 4:59 PM, Eric Scheid wrote:

>
> On 27/9/06 8:15 AM, "Tim Bray" <tbray@textuality.com> wrote:
>
>> PaceAppEdited: Lots of discussion.  There seems universal support for
>> the utility of an app:edited element, and an assertion that entry
>> members SHOULD contain one.  On the other hand, every discussion of
>> sort order has spiraled instantly into a rat-hole.
>>
>> Conclusion.  PaceAppEdited is accepted, in part. The second part of
>> the proposal, defining the app:edited element, is ACCEPTED.  The
>> first part, imposing a requirement on the sort order of collections,
>> clearly does not have consensus support.
>
> There also seems to be universal support for the notion that =20
> collection
> feeds could be sorted by something other than what's currently in =20
> the spec.
> The spec currently not only says collections are to be sorted by
> atom:updated, but because of the MUST it also says it MUST NOT be =20
> sorted by
> anything *else*, which is a problem.
>
> Section 10.0 =B6 2 says this:
>
>     The entries in the returned Atom Feed MUST be ordered by their
>    "atom:updated" property, with the most recently updated entries
>     coming first in the document order. Clients SHOULD be constructed
>     in consideration of the fact that changes which do not alter the
>     atom:updated value of an entry will not affect the position of
>     the entry in a Collection.
>
> We need to either strike that entire paragraph, or at the very =20
> least make
> that MUST into a SHOULD.
>
> I say +1 to s/MUST/SHOULD/
>
> e.
>
>





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Alastair Rankine wrote:
> 
> Hello Atom folks,
> 
> Here is a proposal for an Atom-derived format for exporting of content.
> 
> The problem I'm trying to solve is that of migration from one authoring 
> system (eg blogging engine) to another. Atom is highly suited to this task.
> 
> The full problem statement, and the reasons for basing the solution on 
> Atom, are all described in the proposal published here:
> 
> http://girtby.net/offerings/atomexport
> 
> There is no implementation yet.
> 
> I look forward to your comments on this document.


Very quickly (I'm overloaded atm) - this is excellent.

I've been looking at using Atom Entries for roundtripping/backup and 
interchange, especially in CMSes, for some time. The ultimate dump 
format in terms of expressiveness is RDF/XML, but it can be complicated. 
Atom offers a lot of value with comparative simplicity largely because 
atom:id can survive across systems*, but also because the flat format of 
entries maps well onto relational data (it's particularly good for 
dumping metadata). One hard problem is in usefully storing and indexing 
received foreign markup.

cheers
Bill

* that said, for "consumer" data, the APP leans towards, or least 
allows, rewriting of atom:ids due to trust issues.




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From: James M Snell <jasnell@gmail.com>
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I haven't done much deep thinking about this proposal yet, but the one
thing that concerns me are the non-atom resources that go along with the
entries.  When I export from a blog, I want to be able to export
everything in a single operation.  I've been stewing lately over the
possibility of doing something similar to this but wrapping the atom
documents and associated resources into a zip.  A single master atom
feed would provide an index of the archive, with individual entries
either contained in that index feed or as separate entry documents
(modeled loosely after the distinction app makes between the collection
feed and individual editable entries.

- James

Bill de hOra wrote:
> 
> Alastair Rankine wrote:
>>
>> Hello Atom folks,
>>
>> Here is a proposal for an Atom-derived format for exporting of content.
>>
>> The problem I'm trying to solve is that of migration from one
>> authoring system (eg blogging engine) to another. Atom is highly
>> suited to this task.
>>
>> The full problem statement, and the reasons for basing the solution on
>> Atom, are all described in the proposal published here:
>>
>> http://girtby.net/offerings/atomexport
>>
>> There is no implementation yet.
>>
>> I look forward to your comments on this document.
> 
> 
> Very quickly (I'm overloaded atm) - this is excellent.
> 
> I've been looking at using Atom Entries for roundtripping/backup and
> interchange, especially in CMSes, for some time. The ultimate dump
> format in terms of expressiveness is RDF/XML, but it can be complicated.
> Atom offers a lot of value with comparative simplicity largely because
> atom:id can survive across systems*, but also because the flat format of
> entries maps well onto relational data (it's particularly good for
> dumping metadata). One hard problem is in usefully storing and indexing
> received foreign markup.
> 
> cheers
> Bill
> 
> * that said, for "consumer" data, the APP leans towards, or least
> allows, rewriting of atom:ids due to trust issues.
> 
> 




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Date: Wed, 27 Sep 2006 21:11:22 -0700
From: John Panzer <jpanzer@aol.net>
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To: Tim Bray <Tim.Bray@Sun.COM>
CC: Atom Syntax <atom-syntax@imc.org>, atom-protocol <atom-protocol@imc.org>
Subject: Re: URGENT: Remove atom:updated ordering requirement?
References: <C13FFC14.B99A6%eric.scheid@ironclad.net.au> <A75BC219-A169-4884-B85F-B571DB825CA5@sun.com>
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+1 to removing the MUST.
+0 to changing it to SHOULD.

Tim Bray wrote:

>
> <co-chair-mode>
> Please see the dialogue below.
> </co-chair-mode>
>
> (Eric's point seems plausible to me; personally I'd be inclined to a =20
> +1.)
>
> <co-chair-mode>
> Can we have some feedback from the WG ASAP?  We want to take =20
> protocol-11 to the IETF.
> </co-chair-mode>
>
>   -Tim
>
> On Sep 26, 2006, at 4:59 PM, Eric Scheid wrote:
>
>>
>> On 27/9/06 8:15 AM, "Tim Bray" <tbray@textuality.com> wrote:
>>
>>> PaceAppEdited: Lots of discussion.  There seems universal support for
>>> the utility of an app:edited element, and an assertion that entry
>>> members SHOULD contain one.  On the other hand, every discussion of
>>> sort order has spiraled instantly into a rat-hole.
>>>
>>> Conclusion.  PaceAppEdited is accepted, in part. The second part of
>>> the proposal, defining the app:edited element, is ACCEPTED.  The
>>> first part, imposing a requirement on the sort order of collections,
>>> clearly does not have consensus support.
>>
>>
>> There also seems to be universal support for the notion that  collecti=
on
>> feeds could be sorted by something other than what's currently in =20
>> the spec.
>> The spec currently not only says collections are to be sorted by
>> atom:updated, but because of the MUST it also says it MUST NOT be =20
>> sorted by
>> anything *else*, which is a problem.
>>
>> Section 10.0 =B6 2 says this:
>>
>>     The entries in the returned Atom Feed MUST be ordered by their
>>    "atom:updated" property, with the most recently updated entries
>>     coming first in the document order. Clients SHOULD be constructed
>>     in consideration of the fact that changes which do not alter the
>>     atom:updated value of an entry will not affect the position of
>>     the entry in a Collection.
>>
>> We need to either strike that entire paragraph, or at the very  least=20
>> make
>> that MUST into a SHOULD.
>>
>> I say +1 to s/MUST/SHOULD/
>>
>> e.
>>
>>
>




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Cc: Atom Syntax <atom-syntax@imc.org>, atom-protocol <atom-protocol@imc.org>
From: Henry Story <henry.story@bblfish.net>
Subject: Re: URGENT: Remove atom:updated ordering requirement?
Date: Thu, 28 Sep 2006 18:45:26 +0200
To: Tim Bray <Tim.Bray@Sun.COM>
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+1 to make the MUST a SHOULD
+1 on app:edited

But I think it would be really useful if we could have something that =20
allowed the user to specify how the feed should be sorted.

Henry

On 27 Sep 2006, at 22:14, Tim Bray wrote:

>
> <co-chair-mode>
> Please see the dialogue below.
> </co-chair-mode>
>
> (Eric's point seems plausible to me; personally I'd be inclined to =20
> a +1.)
>
> <co-chair-mode>
> Can we have some feedback from the WG ASAP?  We want to take =20
> protocol-11 to the IETF.
> </co-chair-mode>
>
>   -Tim
>
> On Sep 26, 2006, at 4:59 PM, Eric Scheid wrote:
>
>>
>> On 27/9/06 8:15 AM, "Tim Bray" <tbray@textuality.com> wrote:
>>
>>> PaceAppEdited: Lots of discussion.  There seems universal support =20
>>> for
>>> the utility of an app:edited element, and an assertion that entry
>>> members SHOULD contain one.  On the other hand, every discussion of
>>> sort order has spiraled instantly into a rat-hole.
>>>
>>> Conclusion.  PaceAppEdited is accepted, in part. The second part of
>>> the proposal, defining the app:edited element, is ACCEPTED.  The
>>> first part, imposing a requirement on the sort order of collections,
>>> clearly does not have consensus support.
>>
>> There also seems to be universal support for the notion that =20
>> collection
>> feeds could be sorted by something other than what's currently in =20
>> the spec.
>> The spec currently not only says collections are to be sorted by
>> atom:updated, but because of the MUST it also says it MUST NOT be =20
>> sorted by
>> anything *else*, which is a problem.
>>
>> Section 10.0 =B6 2 says this:
>>
>>     The entries in the returned Atom Feed MUST be ordered by their
>>    "atom:updated" property, with the most recently updated entries
>>     coming first in the document order. Clients SHOULD be constructed
>>     in consideration of the fact that changes which do not alter the
>>     atom:updated value of an entry will not affect the position of
>>     the entry in a Collection.
>>
>> We need to either strike that entire paragraph, or at the very =20
>> least make
>> that MUST into a SHOULD.
>>
>> I say +1 to s/MUST/SHOULD/
>>
>> e.
>>
>>
>