I'm pretty new to Protege tool and SWRL. Been trying to create an ontology, then make use of the "duration" builtin function in the SWRL Temporal Ontology to locate the time difference between 2 datetime properties in my ontology.

However, Protege always prompt an error when they detect "duration", which is a built-in within the ontology.

Am I missing a step? I reckon a java plugin of the builtin functions, but I cannot find it in the web. Can someone help? Thanks!

I'm using Protege 4.2, fyi.

asked 27 Dec '12, 04:57

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dotng
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Asked: 27 Dec '12, 04:57

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Last updated: 27 Dec '12, 04:57