%% You should probably cite rfc5196 instead of this I-D.
@techreport{ietf-simple-prescaps-ext-10,
    number =    {draft-ietf-simple-prescaps-ext-10},
    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-simple-prescaps-ext/10/},
    author =    {Mikko Lonnfors and Krisztian Kiss},
    title =     {{Session Initiation Protocol (SIP) User Agent Capability Extension to Presence Information Data Format (PIDF)}},
    pagetotal = 30,
    year =      2008,
    month =     may,
    day =       14,
    abstract =  {Presence Information Data Format (PIDF) defines a common presence data format for Common Profile for Presence (CPP) compliant presence protocols. This memo defines a PIDF extension to represent SIP User Agent capabilities. {[}STANDARDS-TRACK{]}},
}