By Grigoris Antoniou, Frank van van Harmelen

ISBN-10: 0262012103

ISBN-13: 9780262012102

ISBN-10: 1417560770

ISBN-13: 9781417560776

The advance of the Semantic net, with machine-readable content material, has the aptitude to revolutionize the area large internet and its use. A Semantic net Primer offers an advent and consultant to this rising box, describing its key rules, languages, and applied sciences. compatible to be used as a textbook or for self-study by means of pros, it concentrates on undergraduate-level primary techniques and methods that might allow readers to continue with development purposes on their lonesome. It comprises routines, undertaking descriptions, and annotated references to suitable on-line fabrics. A Semantic internet Primer is the single on hand ebook at the Semantic internet to incorporate a scientific therapy of the several languages (XML, RDF, OWL, and ideas) and applied sciences (explicit metadata, ontologies, and good judgment and inference) which are valuable to Semantic net improvement. The e-book additionally examines such an important similar issues as ontology engineering and alertness eventualities. After an introductory bankruptcy, issues lined in succeeding chapters contain XML and comparable applied sciences that aid semantic interoperability; RDF and RDF Schema, the traditional facts version for machine-processable semantics; and OWL, the W3C-approved ordinary for an online ontology language extra vast than RDF Schema; principles, either monotonic and nonmonotonic, within the framework of the Semantic internet; chosen software domain names and the way the Semantic net would get advantages them; the improvement of ontology-based structures; and present debates on key concerns and predictions for the longer term.

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Where x may be default or fixed Here are examples: Data Types We have already recognized the very restricted selection of data types as a key weakness of DTDs. XML Schema provides powerful capabilities for defining data type. First there is a variety of built-in data types. Here we list a few: • Numerical data types, including integer, Short, Byte, Long, Float, Decimal • String data types, including string, ID, IDREF, CDATA, Language • Date and time data types, including time, Date, Month, Year There are also user-defined data types, comprising simple data types, which cannot use elements or attributes, and complex data types, which can use elements and attributes.

Also, the W3C has defined various languages on top of XML, such as SVG and SMIL. This approach has also been taken for RDF (see chapter 3). It should be noted that XML can serve as a uniform data exchange format between applications. In fact, XML’s use as a data exchange format between applications nowadays far outstrips its originally intended use as document markup language. Companies often need to retrieve information from their customers and business partners, and update their corporate databases accordingly.

This subset of logic is tractable and is supported by efficient reasoning tools. An important advantage of logic is that it can provide explanations for conclusions: the series of inference steps can be retraced. Moreover AI researchers have developed ways of presenting an explanation in a humanfriendly way, by organizing a proof as a natural deduction and by grouping a number of low-level inference steps into metasteps that a person will typically consider a single proof step. Ultimately an explanation will trace an answer back to a given set of facts and the inference rules used.

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A Semantic Web Primer (Cooperative Information Systems) by Grigoris Antoniou, Frank van van Harmelen

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