Catalog

A Catalog is an MOQT Track that provides information about the other tracks being produced by a MSF publisher. A Catalog is used by MSF publishers for advertising their output and for subscribers in consuming that output. The payload of the Catalog object is opaque to Relays and can be end-to-end encrypted. The Catalog provides the names and namespaces of the tracks being produced, along with the relationship between tracks, properties of the tracks that consumers may use for selection and any relevant initialization data.

The catalog track MUST have a case-sensitive Track Name of "catalog".

A catalog object MAY be independent of other catalog objects or it MAY represent a delta update of a prior catalog object. The first catalog object published within a new group MUST be independent. A catalog object SHOULD be published only when the availability of tracks changes.

Each catalog update MUST be mapped to an MOQT Object.