Abstract: A method of media content discovery and playback, the method including receiving a query for media content items from a search client, the query including one or more user subscriber group identifiers and a plurality of search criteria, filtering a plurality of available media content items according to the query to generate a list of matching content items among the plurality of available media content items, returning the list of matching content items to the search client, receiving from the search client a selection token with a content item to subscriber group mapping, providing the token to a user rights manager, receiving a signature authentication from the user rights manager, and issuing a playback key to the search client.

Abstract: Attributes of revisions of a service are identified and maintained. The attributes include immutable data identifying the revisions, times associated with generation of the revisions, connection data associated with accessing the revisions, and other services used by the revisions. The attributes also include mutable data indicating whether the revisions are compatible with various versions of the other services. A discovery request is received from a requesting device, and discovery request identifies versions of the other services used by the requesting device. A revision of the service that is compatible with the used versions of the other services are identified based on the attributes. The identified revision and connection data are identified to the requesting device. The attributes are updated, and a different revision may be identified to the requesting device based on the updates.

Abstract: A method of media content discovery and playback, the method including receiving a query for media content items from a search client, the query including one or more user subscriber group identifiers and a plurality of search criteria, filtering a plurality of available media content items according to the query to generate a list of matching content items among the plurality of available media content items, returning the list of matching content items to the search client, receiving from the search client a selection token with a content item to subscriber group mapping, providing the token to a user rights manager, receiving a signature authentication from the user rights manager, and issuing a playback key to the search client.

Abstract: Attributes of revisions of a service are identified and maintained. The attributes include immutable data identifying the revisions, times associated with generation of the revisions, connection data associated with accessing the revisions, and other services used by the revisions. The attributes also include mutable data indicating whether the revisions are compatible with various versions of the other services. A discovery request is received from a requesting device, and discovery request identifies versions of the other services used by the requesting device. A revision of the service that is compatible with the used versions of the other services are identified based on the attributes. The identified revision and connection data are identified to the requesting device. The attributes are updated, and a different revision may be identified to the requesting device based on the updates.