11. IANA Considerations

   This document defines the "comp" uri-parameter and via-extension.
   New values for "comp" are registered by the IANA at
   http://www.iana.org/assignments/sip-parameters when new signalling
   compression schemes are published in standards track RFCs.  The IANA
   Considerations section of the RFC MUST include the following
   information, which appears in the IANA registry along with the RFC
   number of the publication.

      o  Name of the compression scheme.

      o  Token value to be used. The token MAY be of any length, but
         SHOULD be no more than ten characters long.

   The only entry in the registry for the time being is:

   Compression scheme      Token      Reference
   ---------------------   ---------  ---------
   Signaling Compression   sigcomp    RFC 3486prop