Is citation for Used to indicate the relationship between a Citation and the entity for which it is the Citation. Used for Dataset Citations. ODM2 Controlled Vocabulary Relationship Type CV ODM2 Working Group A vocabulary for describing the type of relationship between two entities in an ODM2 database. Examples include related Actions, Results, datasets, etc. The RelationshipType describes the nature of the relationship between the two entity instances (e.g., a Specimen SamplingFeature "was collected at" a Site SamplingFeature).