%% You should probably cite draft-ietf-rtcweb-constraints-registry instead of this I-D.
@techreport{burnett-rtcweb-constraints-registry-01,
    number =    {draft-burnett-rtcweb-constraints-registry-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-burnett-rtcweb-constraints-registry/01/},
    author =    {Daniel C. Burnett},
    title =     {{IANA Registry for RTCWeb Media Constraints}},
    pagetotal = 5,
    year =      2012,
    month =     apr,
    day =       23,
    abstract =  {Specifications in W3C's Media Capture Task Force and WebRTC Working Group have need of a registry in which to maintain a list of HTML Media constraints. This document defines this registry.},
}