%% You should probably cite rfc3688 instead of this I-D.
@techreport{mealling-iana-xmlns-registry-05,
    number =    {draft-mealling-iana-xmlns-registry-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-mealling-iana-xmlns-registry/05/},
    author =    {Michael H. Mealling},
    title =     {{The IETF XML Registry}},
    pagetotal = 8,
    year =      2003,
    month =     jun,
    day =       18,
    abstract =  {This document describes an IANA maintained registry for IETF standards which use Extensible Markup Language (XML) related items such as Namespaces, Document Type Declarations (DTDs), Schemas, and Resource Description Framework (RDF) Schemas.},
}