Hi, Richard! Richard Cyganiak wrote on Thu, 22 Feb 2007: > I'm not so sure about > comparisons between data models that are less similar. For example, > SQL schemas may contain integrity constraints that use arbitrary SQL > expressions, like calculations. These constraints cannot be expressed > in OWL. Isn't SQL semantically richer then? Oh! I have to admit that I did not think that far. By "relational schemes" I just meant collections of table definitions by their attributes, together with some basic inter-table relationships like foreignkeys. Now, with such general integrity constraints in mind, the whole discussion might perhaps get quite another direction. Hm... Cheers, MichaelReceived on Thursday, 22 February 2007 16:46:39 GMT
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