%% You should probably cite rfc8101 instead of this I-D. @techreport{holmberg-dispatch-mcptt-rp-namespace-04, number = {draft-holmberg-dispatch-mcptt-rp-namespace-04}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-holmberg-dispatch-mcptt-rp-namespace/04/}, author = {Christer Holmberg and Jörgen Axell}, title = {{IANA Registration of New Session Initiation Protocol (SIP) Resource- Priority Namespace for Mission Critical Push To Talk service}}, pagetotal = 6, year = 2017, month = jan, day = 11, abstract = {This document creates an additional Session Initiation Protocol (SIP) Resource-Priority namespace to meet the requirements of the 3GPP defined Mission Critical Push To Talk, and places this namespace in the IANA registry.}, }