%% You should probably cite rfc7459 instead of this I-D.
@techreport{ietf-geopriv-uncertainty-04,
    number =    {draft-ietf-geopriv-uncertainty-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-ietf-geopriv-uncertainty/04/},
    author =    {Martin Thomson and James Winterbottom},
    title =     {{Representation of Uncertainty and Confidence in the Presence Information Data Format Location Object (PIDF-LO)}},
    pagetotal = 39,
    year =      2014,
    month =     oct,
    day =       23,
    abstract =  {This document defines key concepts of uncertainty and confidence as they pertain to location information. Methods for the manipulation of location estimates that include uncertainty information are outlined. This document normatively updates the definition of location information representations defined in RFCs 4119 and 5491. It also deprecates related terminology defined in RFC 3693.},
}