New PDF release: A semantic Web primer

By G Antoniou; Frank Van Harmelen

ISBN-10: 0262267209

ISBN-13: 9780262267205

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HTML representations are intended to display information, so the set of tags is fixed: lists, bold, color, and so on. In XML we may use information in various ways, and it is up to the user to define a vocabulary suitable for the application. Therefore, XML is a metalanguage for markup: it does not have a fixed set of tags but allows users to define tags of their own. TLFeBOOK TLFeBOOK 26 2 Structured Web Documents in XML Just as people cannot communicate effectively if they don’t use a common language, applications on the WWW must agree on common vocabularies if they need to communicate and collaborate.

The following example shows how disambiguation can be achieved. edu/empDTD"> So, namespaces are declared within an element and can be used in that element and any of its children (elements and attributes). A namespace declaration has the form: xmlns:prefix="location" where location is the address of the DTD or schema.

Therefore they are not discussed further in this book. 5 The Semantic Web versus Artificial Intelligence As we have said, most of the technologies needed for the realization of the Semantic Web build upon work in the area of artificial intelligence. Given that AI has a long history, not always commercially successful, one might worry that, in the worst case, the Semantic Web will repeat AI’s errors: big promises that raise too high expectations, which turn out not to be fulfilled (at least not in the promised time frame).

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A semantic Web primer by G Antoniou; Frank Van Harmelen


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