%% You should probably cite rfc3622 instead of this I-D.
@techreport{mealling-liberty-urn-00,
    number =    {draft-mealling-liberty-urn-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-mealling-liberty-urn/00/},
    author =    {Michael H. Mealling},
    title =     {{A Uniform Resource Name (URN) Namespace for the Liberty Alliance Project}},
    pagetotal = 7,
    year =      2003,
    month =     apr,
    day =       11,
    abstract =  {This document describes a Uniform Resource Name (URN) namespace that will identify various objects within the Liberty Architecture for federated network identity.},
}