MusicalWorkClusterRequest
The MusicalWorkClusterRequest message enables a business partner to explicitly request a cluster and receive a MusicalWorkClusterNotification in response. This message is optional since the initiation of a dialogue between two parties can also occur by sending a MusicalWorkClusterNotificaiton (see here).
A cluster may be requested by:
Providing a musical work identifier (e.g., an ISWC); or
In the absence of an ISWC, providing a Title and at least one Writer
A cluster may also be requested by supplying a Resource identifier, clearly indicating that the resulting notification must include:
The specified resource;
The identified musical work as the ClusterRoot; and
All other ClusterMembers associated with the same relevant ClusterRoot.