In order to simplify and standardize the registration process, this
   appendix gives templates for the registration of new values with
   IANA.  Each of these is given in the form of an email message
   template, to be filled in by the registering party.

   E.1  Registration of New Content-type/subtype Values

   Note that MIME is generally expected to be extended by subtypes.  If
   a new fundamental top-level type is needed, its specification must be
   published as an RFC or submitted in a form suitable to become an RFC,
   and be subject to the Internet standards process.

      To:  IANA@isi.edu
      Subject:  Registration of new MIME
           content-type/subtype

      MIME type name:

      (If the above is not an existing top-level MIME type,
      please explain why an existing type cannot be used.)

      MIME subtype name:

      Required parameters:

      Optional parameters:

      Encoding considerations:





 
RFC 1521                          MIME                    September 1993


      Security considerations:

      Published specification:

      (The published specification must be an Internet RFC or
      RFC-to-be if a new top-level type is being defined, and
      must be a publicly available specification in any
      case.)

      Person & email address to contact for further information:

   E.2  Registration of New Access-type Values
           for Message/external-body

      To:  IANA@isi.edu
      Subject:  Registration of new MIME Access-type for
           Message/external-body content-type

      MIME access-type name:

      Required parameters:

      Optional parameters:

      Published specification:

      (The published specification must be an Internet RFC or
      RFC-to-be.)

      Person & email address to contact for further information:






















 
RFC 1521                          MIME                    September 1993


Appendix F -- Summary of the Seven Content-types

   Content-type: text

   Subtypes defined by this document:  plain