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| | Time Ontology in OWL |
 | | In the appendix we also describe a time zone resource in OWL we developed for not only the US but also the entire world, including the time zone ontology, the US time zone instances, and the world time zone instances. |
 | | In an extension of the time ontology [5,9], we also allow temporal predicates to apply directly to events, should the user wish, but here we restrict our treatment to temporal entities. |
 | | Days, weeks, months and years are also relative to the time zone, since, e.g., 2006 began in the Eastern Standard time zone three hours before it began in the Pacific Standard time zone. |
| www.w3.org /TR/owl-time (5262 words) |
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