To specify a feature or features of a conference or broadcast system.
This property parameter is defined by the following notation:
featureparam = "FEATURE" "=" featuretext *("," featuretext) featuretext = ("AUDIO" / ; Audio capability "CHAT" / ; Chat or instant messaging "FEED" / ; Blog or Atom feed "MODERATOR" / ; Moderator dial-in code "PHONE" / ; Phone conference "SCREEN" / ; Screen sharing "VIDEO" / ; Video capability x-name / ; Experimental type iana-token) ; Other IANA-registered type
This property parameter MAY be specified on the "CONFERENCE" property. Multiple values can be specified. The "MODERATOR" value is used to indicate that the property value is specific to the owner/initiator of the conference and contains a URI that "activates" the system (e.g., a "moderator" access code for a phone conference system that is different from the "regular" access code).
CONFERENCE;VALUE=URI;FEATURE=AUDIO:rtsp://audio.example.com/ event CONFERENCE;VALUE=URI;FEATURE=AUDIO,VIDEO:https://video-chat.exam ple.com/;group-id=1234