@techreport{audet-sipping-feature-ref-00,
    number =    {draft-audet-sipping-feature-ref-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-audet-sipping-feature-ref/00/},
    author =    {Francois Audet and Alan Johnston and Rohan Mahy and Cullen Fluffy Jennings},
    title =     {{Feature Referral in the Session Initiation Protocol (SIP)}},
    pagetotal = 20,
    year =      2008,
    month =     feb,
    day =       17,
    abstract =  {Feature referral allows for an application to make a high level request to a User Agent to perform an action or "feature", and let the the User Agent actually execute the feature as it sees fit. Feature referral uses the SIP REFER method with a Refer-To header field containing a URN.},
}