%% You should probably cite draft-ietf-jsonpath-iregexp instead of this I-D.
@techreport{bormann-jsonpath-iregexp-04,
    number =    {draft-bormann-jsonpath-iregexp-04},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-bormann-jsonpath-iregexp/04/},
    author =    {Carsten Bormann and Tim Bray},
    title =     {{I-Regexp: An Interoperable Regexp Format}},
    pagetotal = 10,
    year =      2022,
    month =     apr,
    day =       25,
    abstract =  {This document specifies I-Regexp, a flavor of regular expressions that is limited in scope with the goal of interoperation across many different regular-expression libraries.},
}