%% You should probably cite rfc6588 instead of this I-D.
@techreport{ishikawa-yrpunl-ucode-urn-03,
    number =    {draft-ishikawa-yrpunl-ucode-urn-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-ishikawa-yrpunl-ucode-urn/03/},
    author =    {Chiaki Ishikawa},
    title =     {{A URN Namespace for ucode}},
    pagetotal = 8,
    year =      2012,
    month =     feb,
    day =       16,
    abstract =  {This document describes a Uniform Resource Name (URN) namespace for ucode, an identifier system for objects and places. ucode technology is used in many applications, and this document provides a URN namespace for ucode to enable its use in Internet-related devices and software. This document is not an Internet Standards Track specification; it is published for informational purposes.},
}