Re: WGLC on draft-ietf-mmusic-sdp-simulcast-07
Iñaki Baz Castillo <[email protected]>
| Newsgroups | gmane.ietf.mmusic |
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| Message-ID | <CALiegfn9+Jy+dEc+6EqrwS3xqu=O4deuLJV5aw6N_Rdu3CTroA@mail.gmail.com> |
2017-03-03 16:56 GMT+01:00 Dale R. Worley <[email protected]>: > That purported BNF is really bizarre, since it generates the clearly > incorrect form: > > a=rid:<rid-id> <direction> <restriction>=<value><restriction>=<value> > > A correct description is: > > a=rid:<rid-id> <direction> ( pt=<fmt-list> | <restriction>=<value> ) *( ; <restriction>=<value> ) > > The problem is that BNF doesn't allow you to directly specify what you > want to say: (1) pt is like a parameter, but if it's present, it must > be first, and (2) there must be at least one pt or restriction. And > there's no simple construction for "a list of one or more X's separated > by Y's". Understood. But, anyhow, the a=rid lines in draft-ietf-mmusic-sdp-simulcast-07 are wrong, right? -- Iñaki Baz Castillo <[email protected]> _______________________________________________ mmusic mailing list [email protected] https://www.ietf.org/mailman/listinfo/mmusic