Session Description Protocol
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... The media type application/h224 string is mapped to fields in the
Session Description Protocol (SDP) as follows:
...
... Rosenberg, J. and H. Schulzrinne, "An Offer/Answer Model with Session Description Protocol (SDP)", RFC 3264prop, June 2002. ...
... Handley, M., Jacobson, V., and C. Perkins, "SDP: Session Description Protocol", RFC 4566prop, July 2006. ...