RelationshipTypes are described from the source point of view. The sources are the higher level or the container entities. For example, A Project HIRES a person, so the relationship would be HIRES or Employs. When a consortium is created it HOLDS at least two other organizations. The type of the organizations allowed to be HOLD are determined by the PartyRelationshipType, ... PartyRelationshipType can have cardinality to restrict the number of allowed 2nd parties IN RELATIONSHIP with any given 1st party.
