Erik, OPS-DIR,

This is the OPS-DIR review of the Subject draft.
Please treat these comments as you would any other 
Last Call comments.

Al

Operational Issues:  none foreseen (status is Experimental)

Nits:

1.  Introduction

   Media Type Structured Syntax Suffixes [RFC6838] were introduced as a
   way for a media type to signal that is based on another media type as
   its foundation.  Some structured syntax suffixes were registered
   initially [RFC6839], including "+json" for the widely popular JSON
   Format [RFC7159] format.

s/that is/ that it is/
s/ format//