By Grigoris Antoniou, Visit Amazon's Paul Groth Page, search results, Learn about Author Central, Paul Groth, , Frank van Harmelen, Rinke Hoekstra
The improvement of the Semantic internet, with machine-readable content material, has the capability to revolutionize the area extensive net and its makes use of. A Semantic internet Primer presents an creation and advisor to this always evolving box, describing its key rules, languages, and applied sciences. compatible to be used as a textbook or for autonomous examine by way of execs, it concentrates on undergraduate-level primary options and strategies that would allow readers to continue with development purposes all alone and contains workouts, undertaking descriptions, and annotated references to proper on-line materials.
The 3rd variation of this accepted textual content has been completely up-to-date, with major new fabric that displays a quickly constructing box. remedy of the various languages (OWL2, ideas) expands the assurance of RDF and OWL, defining the knowledge version independently of XML and together with insurance of N3/Turtle and RDFa. A bankruptcy is dedicated to OWL2, the hot W3C average. This version additionally positive factors extra assurance of the question language SPARQL, the guideline language RIF and the potential of interplay among ideas and ontology languages and purposes. The bankruptcy on Semantic net purposes displays the quick advancements of the previous few years. a brand new bankruptcy deals rules for time period tasks. extra fabric, together with updates at the technological tendencies and learn instructions, are available at http://www.semanticwebprimer.org.
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The advance of the Semantic net, with machine-readable content material, has the capability to revolutionize the realm large net and its makes use of. A Semantic internet Primer offers an creation and consultant to this continually evolving box, describing its key rules, languages, and applied sciences. appropriate to be used as a textbook or for self sufficient examine via pros, it concentrates on undergraduate-level basic innovations and methods that might allow readers to continue with development functions on their lonesome and comprises workouts, venture descriptions, and annotated references to appropriate on-line fabrics.
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Additional resources for A Semantic Web Primer
There is no requirement in RDF Schema that the classes together form a strict hierarchy. 5 need not be a tree. A class may have multiple superclasses. If a class A is a subclass of both B1 and B2 , this simply means that every instance of A is both an instance of B1 and an instance of B2 . 4 RDFS: Adding Semantics 43 A hierarchical organization of classes has a very important practical signiﬁcance, which we outline now. Consider the range restriction People can only rent residential units. Suppose Baron Way Apartment is deﬁned as an apartment.
It is possible to deﬁne new properties that apply to an existing class without changing that class. On one hand, this is a powerful mechanism with far-reaching consequences: we may use classes deﬁned by others and adapt them to our requirements through new properties. On the other hand, this handling of properties deviates from the standard approach that has emerged in the area of modeling and object-oriented programming. It is another idiosyncratic feature of RDF/RDFS. 3 Property Hierarchies We saw that hierarchical relationships between classes can be deﬁned.
Org/resource/>. org/ontology/>. swp:BaronWayApartment swp:hasNumberOfBedrooms 3; swp:isPartOf swp:BaronWayBuilding. swp:BaronWayBuilding dbpedia-owl:location dbpedia:Amsterdam, dbpedia:Netherlands. 3 Named Graphs We discussed previously the ability to point to a set of statements together. Trig is an extension to Turtle that allows us to express such a notion. nl/~frankh. We do this by putting brackets around the set of statements we want and assigning that set of statements a URL. ttl#>. org/resource/>.
A Semantic Web Primer by Grigoris Antoniou, Visit Amazon's Paul Groth Page, search results, Learn about Author Central, Paul Groth, , Frank van Harmelen, Rinke Hoekstra