%% You should probably cite rfc9517 instead of this I-D.
@techreport{urn-ddi-00,
    number =    {draft-urn-ddi-00},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-urn-ddi/00/},
    author =    {Joachim Wackerow},
    title =     {{A Uniform Resource Name (URN) Namespace for the Data Documentation Initiative (DDI)}},
    pagetotal = 21,
    year =      2021,
    month =     feb,
    day =       24,
    abstract =  {This document describes the Namespace Identifier (NID) "ddi" for Uniform Resource Names (URNs) used to identify resources that conform to the standards published by the Data Documentation Initiative (DDI) Alliance (https://ddialliance.org/).},
}