@misc{rfc3343,
    series =    {Request for Comments},
    number =    3343,
    howpublished =  {RFC 3343},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC3343},
    url =       {https://www.rfc-editor.org/info/rfc3343},
    author =    {Dr. Marshall T. Rose and Dave Crocker and Graham Klyne},
    title =     {{The Application Exchange (APEX) Presence Service}},
    pagetotal = 23,
    year =      2003,
    month =     may,
    abstract =  {This memo describes the APEX presence service, addressed as the well- known endpoint 'apex=presence'. The presence service is used to manage presence information for APEX endpoints.},
}