%% You should probably cite rfc8914 instead of this I-D.
@techreport{ietf-dnsop-extended-error-02,
    number =    {draft-ietf-dnsop-extended-error-02},
    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-dnsop-extended-error/02/},
    author =    {Warren "Ace" Kumari and Evan Hunt and Roy Arends and Wes Hardaker and David C Lawrence},
    title =     {{Extended DNS Errors}},
    pagetotal = 11,
    year =      2018,
    month =     sep,
    day =       21,
    abstract =  {This document defines an extensible method to return additional information about the cause of DNS errors. The primary use case is to extend SERVFAIL to provide additional information about the cause of DNS and DNSSEC failures.},
}