Abstract
The RDF collections and containers is one of the most used features by RDF technicians and practitioners. Although some work has been published in past, there is not a standard and accepted way for defining collections within OWL DL frameworks. Here, we attempt to address this issue with the introduction of the Collections Ontology (CO) version 2.0. CO is an OWL 2 DL ontology developed for creating sets, bags and lists of resources, and for inferring collection properties even in the presence of incomplete information.