RFC 4288:Media Type Specifications and Registratio...
RFC-Ref

6. Comments on Media Type Registrations


   Comments on registered media types may be submitted by members of the
   community to the IANA.  These comments will be reviewed by the media
   types reviewer and then passed on to the "owner" of the media type if
   possible.  Submitters of comments may request that their comment be
   attached to the media type registration itself, and if the IANA
   approves of this, the comment will be made accessible in conjunction
   with the type registration.



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