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# System prepended metadata

title: draft-fossati-cose-profile

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# draft-fossati-cose-profile

1. MUST NOT change already defined header attributes
2. MAY define new header attributes
   a. if so, MUST define them in the same document
4. MUST use CDDL to fully specify the syntax rules for the profile
5. MUST use the COSE_profile header attribute in the protected header
   a. value of COSE_profile MUST be global unique via:
        - IANA registry
        - using an oid or [cu]ri
        - using a uuid
   b. type of value SHOULD be application appropriate (e.g., constrained node environments)
5. MAY be tagged in front of COSE tag
6. SHOULD define its complementary media-type/content-format