Time in OWL-S

Feng Pan and Jerry R. Hobbs

To provide support for describing temporal properties for OWL-S (formerly DAML-S), in this paper we first introduce an entry sub-ontology of time, which is much simpler than the full ontology of DAML-Time (Hobbs 2002) and provides the basic temporal concepts and relations that most simple applications would need, i.e., a vocabulary for expressing facts about topological relations among instants, intervals, and events, together with information about durations, and about dates and times. Then we demonstrate in detail, using the Congo.com and Bravo Air examples, how this entry sub-ontology of time can be used to support OWL-S, including use cases for defining input parameters and (conditional) output parameters. Segments of OWL encoding of the definitions are shown.

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