%% You should probably cite rfc3969 instead of this I-D.
@techreport{ietf-sip-uri-parameter-reg-02,
    number =    {draft-ietf-sip-uri-parameter-reg-02},
    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-sip-uri-parameter-reg/02/},
    author =    {Gonzalo Camarillo},
    title =     {{The Internet Assigned Number Authority (IANA) Uniform Resource Identifier (URI) Parameter Registry for the Session Initiation Protocol (SIP)}},
    pagetotal = 6,
    year =      2004,
    month =     jun,
    day =       17,
    abstract =  {This document creates an Internet Assigned Number Authority (IANA) registry for the Session Initiation Protocol (SIP) and SIPS Uniform Resource Identifier (URI) parameters, and their values. It also lists the already existing parameters to be used as initial values for that registry. This document specifies an Internet Best Current Practices for the Internet Community, and requests discussion and suggestions for improvements.},
}