@techreport{barnes-sipping-history-info-02,
    number =    {draft-barnes-sipping-history-info-02},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-barnes-sipping-history-info/02/},
    author =    {Mary Barnes},
    title =     {{An Extension to the Session Initiation Protocol for Request History Information}},
    pagetotal = 20,
    year =      2003,
    month =     feb,
    day =       11,
    abstract =  {This draft defines a standard mechanism for capturing the history information associated with a SIP request. This capability enables many enhanced services by providing the information as to how and why a call arrives at a specific application or user. This draft defines a new optional SIP header, History-Info, for capturing the history information in requests. A new option tag, HistInfo, to be included in the Supported header is defined to allow UAs to indicate whether the HistInfo should be returned in responses to a request which has captured the history information.},
}