The Information Framework employs “relationship” entities, such as ProductOfferingRelationship, to support different types of relationships between two entities. For example, one ProductOffering is an alternate for another.<br/>To generalize this capacity to all the RootEntity sub-classes and enhance its capacities, the RootEntityRelationship is introduced.<br/>A RootEntitiyRelationship describes a relationship between two instances of RootEntities. The type of relationship might be very different such as requires, incompatibility, equivalent…<br/>In addition, minimum, maximum and default numbers can be specified for the relationship. <br/>Each RootEntity might reference many relationships (RootEntityRelationship) but each relationship is referenced by only one RootEntity. <br/>