%% You should probably cite draft-ietf-sipping-toip instead of this I-D.
@techreport{vanwijk-sipping-toip-00,
    number =    {draft-vanwijk-sipping-toip-00},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-vanwijk-sipping-toip/00/},
    author =    {Arnoud Van Wijk},
    title =     {{Framework of requirements for real-time text conversation using SIP}},
    pagetotal = 37,
    year =      2004,
    month =     jul,
    day =       20,
    abstract =  {This document provides the framework of requirements for text conversation with real time character-by-character interactive flow over the IP network using the Session Initiation Protocol. The requirements for general real-time text-over-IP telephony, point-to point and conference calls, transcoding, relay services, user mobility, interworking between text-over-IP telephony and existing text-telephony, and some special features including instant messaging have been described.},
}