I have reviewed this document as part of the security directorate's ongoing effort to review all IETF documents being processed by the IESG. These comments were written primarily for the benefit of the security area directors. Document editors and WG chairs should treat these comments just like any other last call comments.

Summary: ready.

The I-D says:

"This document introduces no additional security considerations beyond those associated with the use and resolution of URNs in general."

For a change, I agree.

It goes on to say:

"Distribution of NATO information in any form is subject to its
 security policies. Nonetheless, this specification is for public use
 and not subject to any NATO security policies."

Which seems to involve some magical thinking (how do those security policies magically follow the information?), but this is not a matter I think we should concern ourselves with.