%% You should probably cite rfc4037 instead of this I-D.
@techreport{ietf-opes-ocp-core-05,
    number =    {draft-ietf-opes-ocp-core-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-ietf-opes-ocp-core/05/},
    author =    {Alex Rousskov},
    title =     {{Open Pluggable Edge Services (OPES) Callout Protocol (OCP) Core}},
    pagetotal = 56,
    year =      2004,
    month =     may,
    day =       5,
    abstract =  {This document specifies the core of the Open Pluggable Edge Services (OPES) Callout Protocol (OCP). OCP marshals application messages from other communication protocols: An OPES intermediary sends original application messages to a callout server; the callout server sends adapted application messages back to the processor. OCP is designed with typical adaptation tasks in mind (e.g., virus and spam management, language and format translation, message anonymization, or advertisement manipulation). As defined in this document, the OCP Core consists of application-agnostic mechanisms essential for efficient support of typical adaptations. {[}STANDARDS-TRACK{]}},
}