%% You should probably cite draft-ietf-ecrit-local-emergency-rph-namespace instead of this I-D.
@techreport{polk-ecrit-local-emergency-rph-namespace-04,
    number =    {draft-polk-ecrit-local-emergency-rph-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-polk-ecrit-local-emergency-rph-namespace/04/},
    author =    {James Polk},
    title =     {{IANA Registering a SIP Resource Priority Header Namespace for Local Emergency Communications}},
    pagetotal = 7,
    year =      2009,
    month =     feb,
    day =       20,
    abstract =  {This document creates and IANA registers the new Session Initiation Protocol (SIP) Resource Priority header (RPH) namespace "esnet" for local emergency usage to a public safety answering point (PSAP), between PSAPs, and between a PSAP and first responders and their organizations.},
}