%% You should probably cite draft-ietf-supa-generic-policy-info-model instead of this I-D.
@techreport{strassner-supa-generic-policy-info-model-05,
    number =    {draft-strassner-supa-generic-policy-info-model-05},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-strassner-supa-generic-policy-info-model/05/},
    author =    {John Strassner and Joel M. Halpern and Jason Coleman},
    title =     {{Generic Policy Information Model for Simplified Use of Policy Abstractions (SUPA)}},
    pagetotal = 115,
    year =      2016,
    month =     mar,
    day =       21,
    abstract =  {This document defines an information model for representing policies using a common extensible framework that is independent of language, protocol, repository. It is also independent of the level of abstraction of the content and meaning of a policy.},
}