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Download A Semantic Web Primer, by Grigoris Antoniou, Frank van Harmelen PDF

By Grigoris Antoniou, Frank van Harmelen

The improvement of the Semantic internet, with machine-readable content material, has the capability to revolutionize the area huge internet and its makes use of. A Semantic internet Primer offers an advent and consultant to this nonetheless rising box, describing its key principles, languages, and applied sciences. appropriate to be used as a textbook or for self-study by way of pros, it concentrates on undergraduate-level basic recommendations and strategies that would allow readers to continue with development purposes all alone and comprises routines, venture descriptions, and annotated references to suitable on-line fabrics. A Semantic internet Primer presents a scientific remedy of the several languages (XML, RDF, OWL, and ideas) and applied sciences (explicit metadata, ontologies, and common sense and inference) which are imperative to Semantic internet improvement in addition to such the most important comparable subject matters as ontology engineering and alertness situations. This considerably revised and up to date moment variation displays fresh advancements within the box, masking new software parts and instruments. the hot fabric incorporates a dialogue of such themes as SPARQL because the RDF question language; OWL DLP and its fascinating useful and theoretical houses; the SWRL language (in the bankruptcy on rules); OWL-S (on which the dialogue of net prone is now based). the recent ultimate bankruptcy considers the cutting-edge of the sphere this present day, captures ongoing discussions, and descriptions the main difficult concerns dealing with the Semantic net sooner or later. Supplementary fabrics, together with slides, on-line models of a few of the code fragments within the booklet, and hyperlinks to extra analyzing, are available at

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Extra resources for A Semantic Web Primer,

Example text

When cardinality constraints are not provided explicitly, minOccurs and maxOccurs have value 1 by default. Here are a few examples. Attribute Types The syntax of attribute types is and they may have a number of optional attributes, such as types, type=". " or existence (corresponds to #OPTIONAL and #IMPLIED in DTDs), use="x", where x may be optional or required or prohibited, or a default value (corresponds to #FIXED and default values in DTDs).

All tags in XML must be closed (for example, for an opening tag there must be a closing tag ), whereas in HTML some tags, such as
, may be left open. The enclosed content, together with its opening and closing tags, is referred to as an element. ) A less formal observation is that human users can read both HTML and XML representations quite easily. Both languages were designed to be easily understandable and usable by humans. But how about machines? Imagine an intelligent agent trying to retrieve the names of the authors of the book in the previous example.

March 1998. html>. • T. Berners-Lee. What the Semantic Web Can Represent. September 1998. html>. • E. Dumbill. The Semantic Web: A Primer. November 1, 2000. com/pub/a/2000/11/01/semanticweb/>. • F. van Harmelen and D. Fensel. Practical Knowledge Representation for the Web. 1999. html>. • J. Hendler. Agents and the Semantic Web. IEEE Intelligent Systems 16 (March-April 2001): 30–37. html>. • S. Palmer. The Semantic Web, Taking Form. net/2001/06/swform/>. • S. Palmer. The Semantic Web: An Introduction.

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