Contains a group of managed representation and other managed objects used for representation, that are grouped for conceptual, administrative, or other purposes. Contents of the group may be ordered or hierarchical. In addition to the name, label, and description of the group, the structure allows for the identification of the type of group, a related universe or concept, and a listing of the included ManagedRepresentations, managed objects used for representation, and ManagedRepresentationGroups by reference.