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Session Description  Addressing  generic rules  "a=" SDP Attributes
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SDP attributes defined in

RFC 7701 – Chat Room

RFC 7701 – Section 8
a=chatroom

 

attribute  =/
chatroom‑attr
chatroom-attr =
chatroom‑label  [ ":"  chat‑token  *( SP  chat‑token ) ]
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chatroom-label =
"chatroom"
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chat-token =
( nicknames‑token  /  private‑msg‑token /  ext‑token )
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nicknames-token =
"nickname"
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private-msg-token =
"private‑messages"
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ext-token =
private‑token  /  standard‑token
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private-token =
toplabel  "."  *( domainlabel  "." )  token 
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standard-token =
token 
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