@misc{rfc2778,
    series =    {Request for Comments},
    number =    2778,
    howpublished =  {RFC 2778},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC2778},
    url =       {https://www.rfc-editor.org/info/rfc2778},
    author =    {Hiroyasu Sugano and Mark Day and Jonathan Rosenberg},
    title =     {{A Model for Presence and Instant Messaging}},
    pagetotal = 17,
    year =      2000,
    month =     feb,
    abstract =  {This document defines an abstract model for a presence and instant messaging system. It defines the various entities involved, defines terminology, and outlines the services provided by the system. This memo provides information for the Internet community.},
}