2.2.5.2.6 Type Attribute ("a=type")

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The purpose of the type attribute is to specify a list of properties and capabilities that are applicable to the current content or playlist entry. The type attribute MUST be specified once at the SDP session level, except if specifying it would result in an empty "a=type:" field, in which case the attribute SHOULD be omitted.

The syntax of the type attribute is as follows.

 wm-feat    = "broadcast" | "lastentry" 
              | "notseekable" | "notstridable" | "playlist" 
              | "skipbackward" | "skipforward" 
 type       = "a=type:" [wm-feat *6("," wm-feat)]

For example: a=type:notseekable,notstridable