%% You should probably cite rfc4759 instead of this I-D.
@techreport{ietf-iptel-tel-enumdi-05,
    number =    {draft-ietf-iptel-tel-enumdi-05},
    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-iptel-tel-enumdi/05/},
    author =    {Lawrence W. Conroy and Richard Shockey and Richard Stastny},
    title =     {{The ENUM Dip Indicator Parameter for the "tel" URI}},
    pagetotal = 8,
    year =      2006,
    month =     jun,
    day =       29,
    abstract =  {This document defines a new parameter "enumdi" for the "tel" Uniform Resource Identifier (URI) to support the handling of ENUM queries in Voice over Internet Protocol (VoIP) network elements. A VoIP network element may receive a URI containing an E.164 number, where that URI contains an "enumdi" parameter. The presence of the "enumdi" parameter indicates that an ENUM query has already been performed on the E.164 number by a previous VoIP network element. Equally, if a VoIP network element sends such a URI, it asserts that an ENUM query has been carried out on this number. {[}STANDARDS-TRACK{]}},
}