@misc{rfc7991,
    series =    {Request for Comments},
    number =    7991,
    howpublished =  {RFC 7991},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC7991},
    url =       {https://www.rfc-editor.org/info/rfc7991},
    author =    {Paul E. Hoffman},
    title =     {{The "xml2rfc" Version 3 Vocabulary}},
    pagetotal = 151,
    year =      2016,
    month =     dec,
    abstract =  {This document defines the "xml2rfc" version 3 vocabulary: an XML-based language used for writing RFCs and Internet-Drafts. It is heavily derived from the version 2 vocabulary that is also under discussion. This document obsoletes the v2 grammar described in RFC 7749.},
}