http://swan.mindinformatics.org/ontologies/1.2/collections.owl Created with TopBraid Composer http://www.ontologydesignpatterns.org/cp/owl/list.owl http://www.ontologydesignpatterns.org/cp/owl/bag.owl What is the cardinality (size) of this set? http://www.ontologydesignpatterns.org/cp/owl/collectionentity.owl To model sets of things (elements). A Set is a collection that cannot contain duplicate elements. A Set is a collection that cannot contain duplicate elements. A Set is expressed by linking to it directly all the members (elements), multiple identical values of members (elements) will be eliminated because by default they are treated as a set. What are the elements in this set? PaoloCiccarese http://swan.mindinformatics.org/ontologies/1.2/collections.owl Set - A collection that cannot contain duplicate elements. set size - The number of items belonging to a collection size The link to the members of a Set