A Semantic Web Primer - Chapter 4 pptx

... 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

... and van Harmelen ,!7IA2G2-abcbac!:t;K;k;K;k 0-2 6 2-0 121 0-3 #737806 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. Datab...

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 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

... ⇒¬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 ... direct access to the data through the ontology. We illustrate the general idea using a camera example. 4 Here is one way in which a particular data source or application may talk...

Ngày tải lên: 14/08/2014, 11:20

... Maintenance Besides basic storage and retrieval functionality, a practical Semantic Web repository will have to provide functionality for managing and maintaining the ontology: change management, access and ownership ... Web • Extraction of relational data and metadata from existing data on the Web • Merging and mapping ontologies by analyzing extensions of concepts • Maintaining on...

Ngày tải lên: 14/08/2014, 11:20

... Enumerations EnumeratedClass(weekdays Monday Tuesday Wednesday Thursday Friday Saturday Sunday) 4. 2.9: Instances Individual( 949 352 type(academicStaffMember)) Individual( 949 352 type(academicStaffMember) value(age ... complete annotation(rdfs:comment "Carnivores are exactly those animals that eat animals.") intersectionOf(animal restriction(eats someValuesFrom (animal)))) Class(...

Ngày tải lên: 14/08/2014, 11:20

... yesterday, and forty to-day. Know of a job, guv'nor? I'm not particular." "I wish I did," Brooks answered, simply. "Here's half -a- crown. Go to that coffee-palace ... ourselves a great obligation. We've got to find the truth. That's why I hesitate to say anything against Henslow's new departure. We're off the track now. I want t...

Ngày tải lên: 06/07/2014, 02:20