A Semantic Web Primer - Chapter 0 docx

... and van Harmelen ,!7IA2G2-abcbac!:t;K;k;K;k 0- 2 6 2 -0 121 0- 3 #737 806 03 /23 /04 A Semantic Web Primer Grigoris Antoniou and Frank van Harmelen The development of the Semantic Web, with machine-readable ... was factored out from the database proper and entrusted to the small group of regular users and application programs. The advent of the Web has changed all that. Dat...

Ngày tải lên: 14/08/2014, 11:20

... widely available. Already we rarely have to start from scratch when defining an ontology. There is almost always an ontology available from a third party that provides at least a useful starting ... Maintenance Besides basic storage and retrieval functionality, a practical Semantic Web repository will have to provide functionality for managing and maintaining the ontology: change man...

Ngày tải lên: 14/08/2014, 11:20

... Schema. • Upward partial understanding. On the other hand, agents fully aware of a layer should take at least partial advantage of information at higher levels. For example, an agent aware only of ... 1998. <http://www.w3.org/DesignIssues/RDFnot.html>. •E.Dumbill. The Semantic Web: A Primer. November 1, 200 0. <http://www.xml.com/pub /a/ 200 0/11 /01 /semanticweb/>. •F.van...

Ngày tải lên: 14/08/2014, 11:20

... format- ting language. Its ability to move data and metadata from one XML rep- resentation to another makes it a most valuable tool for XML-based applica- tions. Generally XSLT is chosen when applications ... 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 e...

Ngày tải lên: 14/08/2014, 11:20

... For example, given that the domain of teaches is academicStaffMember, that aca- demicStaffMember is a subclass of staffMembers,and that teaches(DB, DiMa), the agent can automatically deduce staffMember(DB) ... RDF and RDF Schema. Consider, for example, rdfs:subClassOf. The namespace specifies only that it applies to classes and has a class as a value. The meaning of being a subclass, n...

Ngày tải lên: 14/08/2014, 11:20

... ontology: •Vocabulary partitioning. Any resource is allowed to be only a class, a data type, a data type property, an object property, an individual, a data value, or part of the built-in vocabulary, and not ... more than one of these. This means that, for example, a class cannot at the same time be an individual, or that a property cannot have some values from a data type and s...

Ngày tải lên: 14/08/2014, 11:20

... ⇒¬acceptable(X) r 9 >r 1 5.6.2 Representation of Available Apartments Each available apartment is given a unique name, and its properties are rep- resented as facts. For example, apartment a 1 might ... table 5.1. In practice, the flats on offer could be stored in a relational database. If we match Carlos’s requirements and the available apartments, we see that • flat a 1 is not acce...

Ngày tải lên: 14/08/2014, 11:20

... Semantic Web Technology The key ideas of the Semantic Web, namely, common shared meaning (ontol- ogy) and machine-processable metadata, establish a promising approach for satisfying the e-learning ... the size of Audi (51 ,00 0 employees, $22 billion revenue, 700 ,00 0 cars produced annually) op- erates thousands of databases, often duplicating and reduplicating the same information,...

Ngày tải lên: 14/08/2014, 11:20

... (herbivore))) Class(plant partial annotation(rdfs:comment "Plants form a class disjoint from animals.")) Class(tasty-plant partial annotation(rdfs:comment "Tasty plants are plants that are eaten both ... 23 TLFeBOOK TLFeBOOK 231 intersectionOf( animal restriction(eats allValuesFrom (unionOf(plant restriction(is-part-of allValuesFrom (plant))))))) Class(leaf partial annotation...

Ngày tải lên: 14/08/2014, 11:20

... company well over $ 100 ,00 0 a year. And a market test for 6 to 12 months may cost $ 200 ,00 0 to $ 500 ,00 0 per test market! Companies that are willing and able to pay the cost often find that marketing infor mation ... needed data is available and accessible quickly. Marketing managers deal with rapidly changing envi- ronments. Available data is not always adequate to answer the detail...

Ngày tải lên: 01/07/2014, 20:20