SenML Options

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Last updated 2017-09-10 (latest revision 2017-03-09)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


SenML [I-D.ietf-core-senml] defines an initial set of base and regular attributes which are tied to a particular version of SenML. SenML also allows the definition of additional attributes by extending the syntax with a new label. Allowing the extension of attributes brings the problem of how do endpoints negotiate whether the new attribute can be used or not? This document discusses the issue and proposes some potential solutions to this issue.


Christian Groves (
Weiwei Yang (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)