%% You should probably cite rfc5051 instead of this I-D.
@techreport{crispin-collation-unicasemap-07,
    number =    {draft-crispin-collation-unicasemap-07},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-crispin-collation-unicasemap/07/},
    author =    {Mark Crispin},
    title =     {{i;unicode-casemap - Simple Unicode Collation Algorithm}},
    pagetotal = 7,
    year =      2007,
    month =     aug,
    day =       31,
    abstract =  {This document describes "i;unicode-casemap", a simple case-insensitive collation for Unicode strings. It provides equality, substring, and ordering operations. {[}STANDARDS-TRACK{]}},
}