%% You should probably cite rfc9290 instead of this I-D.
@techreport{ietf-core-problem-details-01,
    number =    {draft-ietf-core-problem-details-01},
    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-core-problem-details/01/},
    author =    {Thomas Fossati and Jaime Jimenez and Klaus Hartke},
    title =     {{Problem Details For CoAP APIs}},
    pagetotal = 7,
    year =      2020,
    month =     jul,
    day =       13,
    abstract =  {This document defines a "problem detail" as a way to carry machine- readable details of errors in a CoAP response to avoid the need to define new error response formats for CoAP APIs. The proposed format is inspired by the Problem Details for HTTP APIs defined in RFC 7807. Discussion Venues This note is to be removed before publishing as an RFC. Source for this draft and an issue tracker can be found at https://github.com/core-wg/core-problem-details (https://github.com/ core-wg/core-problem-details).},
}