Multipart Content Format Encoding for CoAP

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Document Type Expired Internet-Draft (individual)
Last updated 2013-04-05 (latest revision 2012-10-02)
Replaced by draft-ietf-core-multipart-ct
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This memo defines a new content format encoding that can be used to combine several different media types into a single CoAP message- body. The proposed encoding provides a cheap framing facility aimed at minimizing the overhead bits as much as possible. Its main use case is for applications whose purpose is as simple as just pulling together a number of known content formats, with the caveat that their juxtaposition must not raise any semantic ambiguity on the receiving side (i.e. strictly ordered, with no optional parts).


Thomas Fossati (

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