This memo defines the Publish Option for the Constrained Application
Protocol (CoAP). The Publish Option is used by a CoAP Endpoint to
control the authority delegation of one of its resources to another
Endpoint. All the phases of the authority delegation process (setup,
renewal, cancellation) are controlled by a simple RESTful protocol.
This memo also introduces the 'proxies' Web Linking relation type, to
be used by a CoAP Proxy to explicitly advertise the resources that it
can serve - either from its cache, or by forwarding the Client's
The Publish Option and the 'proxies' relation provide the building
blocks for a comprehensive, in-protocol, solution to the sleepy/
intermittent Endpoint use case.