%% You should probably cite rfc9493 instead of this I-D.
@techreport{ietf-secevent-subject-identifiers-07,
    number =    {draft-ietf-secevent-subject-identifiers-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-ietf-secevent-subject-identifiers/07/},
    author =    {Annabelle Backman and Marius Scurtescu},
    title =     {{Subject Identifiers for Security Event Tokens}},
    pagetotal = 21,
    year =      2021,
    month =     mar,
    day =       9,
    abstract =  {Security events communicated within Security Event Tokens may support a variety of identifiers to identify subjects related to the event. This specification formalizes the notion of subject identifiers as structured information that describe a subject, and named formats that define the syntax and semantics for encoding subject identifiers as JSON objects. It also defines a registry for defining and allocating names for such formats, as well as the "sub\_id" JSON Web Token (JWT) claim.},
}