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

By Grigoris Antoniou, Frank van Harmelen

The improvement of the Semantic net, with machine-readable content material, has the capability to revolutionize the realm broad internet and its makes use of. A Semantic net Primer offers an creation 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 through pros, it concentrates on undergraduate-level primary recommendations and methods that may let readers to continue with development purposes on their lonesome and comprises routines, venture descriptions, and annotated references to suitable on-line fabrics. A Semantic net Primer presents a scientific therapy of different languages (XML, RDF, OWL, and ideas) and applied sciences (explicit metadata, ontologies, and common sense and inference) which are important to Semantic net improvement in addition to such the most important comparable issues as ontology engineering and alertness situations. This considerably revised and up to date moment version displays contemporary advancements within the box, overlaying new program parts and instruments. the hot fabric contains a dialogue of such subject matters as SPARQL because the RDF question language; OWL DLP and its attention-grabbing useful and theoretical houses; the SWRL language (in the bankruptcy on rules); OWL-S (on which the dialogue of internet prone is now based). the hot ultimate bankruptcy considers the state-of-the-art of the sector at the present time, captures ongoing discussions, and descriptions the main demanding matters dealing with the Semantic internet 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 examining, are available at www.semanticwebprimer.org.

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Extra resources for A Semantic Web Primer,

Example text

We cannot wait until the full Semantic Web vision materializes — it may take another ten years for it to be realized to its full extent (as envisioned 18 1 The Semantic Web Vision today, of course). In building one layer of the Semantic Web on top of another, two principles should be followed: • Downward compatibility. Agents fully aware of a layer should also be able to interpret and use information written at lower levels. For example, agents aware of the semantics of OWL can take full advantage of information written in RDF and RDF Schema.

Attributes Consider the element from the previous section. ATTLIST item itemNo ID #REQUIRED quantity CDATA #REQUIRED comments CDATA #IMPLIED> Compared to the previous example, a new aspect is that the item element type is defined to be empty. Another new aspect is the appearance of + after item in the definition of the order element type. : appears zero times or once.

The agent had found his name from an independent list of therapists and had already checked that Michael was entitled to the insurer’s maximum coverage, according to the insurer’s policy. It had also negotiated with the therapist’s agent a special discount. The therapist had only recently decided to charge more than average and was keen to find new patients. Michael was happy with the recommendation because he would have to pay only a few dollars extra. However, because he had installed the Semantic Web agent a few days ago, he asked it for explanations of some of its assertions: how was the therapist’s reputation established, why was it necessary for Michael to reschedule some of his work appointments, how was the price negotiation conducted?

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