]> collection entity membership 1.1 added rdfs:isDefinedBy for all named entities Aldo Gangemi Collections and their members can be associated. Time-indexed membership cannot be represented though (you need a situation-based pattern). Created by Aldo Gangemi and Valentina Presutti My saxophone collection includes a Mark VI tenor, a Balanced Action alto, and a Conn Transitional bari. The collection entity pattern. It is extracted from DOLCE-UltraLite by partial clone of elements. TimeIndexedMembership To represent domain (not set theory) membership. What things are contained in this collection (community, collective)? What collections this thing is member of? http://www.ontologydesignpatterns.org/ont/dul/DUL.owl has member A relation between collections and entities, e.g. 'my collection of saxophones includes an old Adolphe Sax original alto' (i.e. my collection has member an Adolphe Sax alto). is member of Collection Any container for entities that share one or more common properties. E.g. "stone objects", "the nurses", "the Louvre Aegyptian collection". A collection is not a logical class: a collection is a first-order entity, while a class is a second-order one.