@misc{rfc5688,
    series =    {Request for Comments},
    number =    5688,
    howpublished =  {RFC 5688},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC5688},
    url =       {https://www.rfc-editor.org/info/rfc5688},
    author =    {Jonathan Rosenberg},
    title =     {{A Session Initiation Protocol (SIP) Media Feature Tag for MIME Application Subtypes}},
    pagetotal = 7,
    year =      2010,
    month =     jan,
    abstract =  {The caller preferences specification for the Session Initiation Protocol (SIP) allows a caller to express preferences that the call be routed to a User Agent (UA) with particular capabilities. Similarly, a specification exists to allow a UA to indicate its capabilities in a registration. Amongst those capabilities are the type of media streams the agent supports, described as top-level MIME types. The 'application' MIME type is used to describe a broad range of stream types, and it provides insufficient granularity as a capability. This specification allows a UA to indicate which application subtypes the agent supports. {[}STANDARDS-TRACK{]}},
}