A Semantic Web Primer - Chapter 3 doc

... the Semantic Web vision. In this chapter, sections 3. 2 and 3. 3 discuss RDF: the basic ideas of RDF and its XML-based syntax, and sections 3. 4 and 3. 5 introduce the basic concepts and the language ... 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,...

Ngày tải lên: 14/08/2014, 11:20

... Frank van Harmelen A Semantic Web Primer Antoniou 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 ... 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...

Ngày tải lên: 14/08/2014, 11:20

... these areas. • Ontology integration and navigation deal with reconstructing and navi- gating in large and possibly machine-learned knowledge bases. For ex- ample, the task can be to change the ... for managing and maintaining the ontology: change management, access and ownership rights, transaction management. Besides lightweight ontologies that are automatically generated from un- structured...

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 ... try again. A few minutes later the agent came back with an alternative: A therapist with an excellent reputation who had available appointments starting in two days. However, there were a...

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...

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

... ,B n . 5 .3. 2 Facts A fact is an atomic formula, such as loyalCustomer (a3 45678);itsays that the customer with ID a3 45678 is loyal. The variables of a fact are implicitly universally quantified. 5 .3. 3 Logic ... ⇒¬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...

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 ... Semantic Web Technology Using ontologies as semantic data models can rationalize disparate data sources into one body of information. By creating ontologies for data and content s...

Ngày tải lên: 14/08/2014, 11:20

... Enumerations EnumeratedClass(weekdays Monday Tuesday Wednesday Thursday Friday Saturday Sunday) 4.2.9: Instances Individual(94 935 2 type(academicStaffMember)) Individual(94 935 2 type(academicStaffMember) value(age ... herbivores.") carnivore restriction(eats allValuesFrom (herbivore))) Class(plant partial annotation(rdfs:comment "Plants form a class disjoint from animals.")...

Ngày tải lên: 14/08/2014, 11:20

... broad product- markets is disaggregating Market grid is a visual aid to market segmentation Segmenting is an aggregating process Perreault−McCarthy: Basic Marketing: A Global−Managerial Approach, ... This usually includes data on a customer’s past purchases as well as other segmenting information. For example, an auto-repair garage that keeps a data- base of customer oil changes can...

Ngày tải lên: 01/07/2014, 20:20