%% You should probably cite rfc5028 instead of this I-D.
@techreport{ietf-enum-im-service-03,
    number =    {draft-ietf-enum-im-service-03},
    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-enum-im-service/03/},
    author =    {Rohan Mahy},
    title =     {{A Telephone Number Mapping (ENUM) Service Registration for Instant Messaging (IM) Services}},
    pagetotal = 5,
    year =      2007,
    month =     jul,
    day =       11,
    abstract =  {This document registers a Telephone Number Mapping (ENUM) service for Instant Messaging (IM). Specifically, this document focuses on provisioning 'im:' URIs (Uniform Resource Identifiers) in ENUM. {[}STANDARDS-TRACK{]}},
}