%% You should probably cite rfc7641 instead of this I-D. @techreport{ietf-core-observe-15, number = {draft-ietf-core-observe-15}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-ietf-core-observe/15/}, author = {Klaus Hartke}, title = {{Observing Resources in CoAP}}, pagetotal = 34, year = 2014, month = oct, day = 27, abstract = {The Constrained Application Protocol (CoAP) is a RESTful application protocol for constrained nodes and networks. The state of a resource on a CoAP server can change over time. This document specifies a simple protocol extension for CoAP that enables CoAP clients to "observe" resources, i.e., to retrieve a representation of a resource and keep this representation updated by the server over a period of time. The protocol follows a best-effort approach for sending new representations to clients and provides eventual consistency between the state observed by each client and the actual resource state at the server.}, }