%% You should probably cite draft-ietf-cdni-metadata-expression-language instead of this I-D.
@techreport{power-metadata-expression-language-03,
    number =    {draft-power-metadata-expression-language-03},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-power-metadata-expression-language/03/},
    author =    {Will Power and Glenn Goldstein and Arnon Warshavsky},
    title =     {{CDNI Metadata Expression Language}},
    pagetotal = 21,
    year =      ,
    month =     ,
    day =       ,
    abstract =  {This document specifies the syntax and provides usage examples for an expression language to be used within Streaming Video Technology Alliance (SVTA)/Content Delivery Network Interconnection (CDNI) Metadata Interface (MI) objects. The purpose of this expression language is to enable metadata to be applied conditionally (based on aspects of an HTTP request), and to enable Hypertext Transfer Protocol (HTTP) responses to be generated or altered dynamically.},
}