+ An <ref target="ore:Aggregation">Aggregation</ref> which forms a component part of this Aggregation.
+ </p>
+ <p>
+ <ptr target="(PCDM)"/> describes this property only in terms of <ref target="pcdm:Object">Objects</ref> and <ref target="pcdm:Collection">Collections</ref>, but formally defines its domain and range as Aggregations.
+ While this might have only been a modelling convenience, this ontology preserves the broader definition, to allow the use of this term without needing a firm stance on whether something is (or isn¦t) an Object or Collection as <ptr target="(PCDM)"/> would have it.