David Leal

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Ontologies reflect our view of what exists and developing ontologies for a given domain requires a common context. This context can be characterized explicitly by means of an upper ontology. Upper ontologies define top-level concepts such as physical objects, activities, mereological and topological relations from which more specific classes and relations(More)
SUMMARY The Web is an information resource with unlimited potential. However, this potential is not yet fully used since it is difficult for machines to process and integrate the meaning of the information stored on the Web. Recently the Internet community has begun to explore the potential of associating web content with explicit meaning, in order to(More)
To qualify materials for specific applications comprehensive testing is necessary, and consequently the engineering materials community has developed an extensive collection of documentary testing standards to define test conditions, specimen configurations, and post processing and reporting procedures. Unfortunately, in the absence of corresponding data(More)
This poster describes the scope and current work of the W3C Product Modelling Incubator Group. SCOPE The poster will show the latest results of the W3C Product modelling XG [1], which began work in June 2008. The first topics addressed by the XG have been: • how physical products are put together from parts – this is product structure; and • the physical(More)
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