A semantic web primer

... Zahir Tari, editors, 200 0 Workflow Management: Models, Methods, and Systems Wil van der Aalst and Kees Max van Hee, 200 2 A Semantic Web Primer Grigoris Antoniou and Frank van Harmelen, 200 4 TLFeBOOK ... the Web has changed all that Databases today are made available, in some form, on the Web where users, application programs, and uses are open-ended and ever changing In such a...

Ngày tải lên: 14/08/2014, 11:20

... information: data about data Metadata capture part of the meaning of data, thus the term semantic in Semantic Web In our example scenarios in section 1. 2 there seemed to be no barriers in the access ... government has established the DARPA Agent Markup Language (DAML) Project, and the Semantic Web is among the key action lines of the European Union’s Sixth Framework Programme 1....

Ngày tải lên: 14/08/2014, 11:20

... of an e-mail to contain exactly one text and a number of attachments Modify the schema to allow for an arbitrary number of texts and attachments in any order 2. 2 Search the Web for XML applications, ... data and metadata from one XML representation to another makes it a most valuable tool for XML-based applications Generally XSLT is chosen when applications that use different DTDs or...

Ngày tải lên: 14/08/2014, 11:20

... superclasses; all instances of a class are instances of its superclass Note that a class may be a subclass of more than one class As an example, the class femaleProfessor may be a subclass of ... machineaccessible, in accordance with 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 a...

Ngày tải lên: 14/08/2014, 11:20

... necessary to declare owl:Class as a subclass of rdfs:Class TLFeBOOK TLFeBOOK Exercises and Projects 149 4. 10 In chapter we presented an axiomatic semantics for RDF A similar axiomatic semantics can ... 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 h...

Ngày tải lên: 14/08/2014, 11:20

... Bn 5. 3.2 Facts A fact is an atomic formula, such as loyalCustomer (a3 456 78); it says that the customer with ID a3 456 78 is loyal The variables of a fact are implicitly universally quantified 5. 3.3 ... Carlos’s requirements and the available apartments, we see that • flat a1 is not acceptable because it has one bedroom only (rule r2 ) • flats a4 and a6 are unacceptable because pets...

Ngày tải lên: 14/08/2014, 11:20

... the semantics of the data 6. 3.3 The Contribution of Semantic Web Technology Using ontologies as semantic data models can rationalize disparate data sources into one body of information By creating ... 6. 4 6. 6 e-Learning 6. 6.1 Browsing ontologically organized papers in Spectacle The Setting The World Wide Web is currently changing many areas of human activity, among them learni...

Ngày tải lên: 14/08/2014, 11:20

... the Web of meta-data The success of the Semantic Web greatly depends on the proliferation of ontologies and relational metadata This requires that such metadata can be produced at high speed and ... data on the Web • Extraction of relational data and metadata from existing data on the Web • Merging and mapping ontologies by analyzing extensions of concepts • Maintaining ontologies b...

Ngày tải lên: 14/08/2014, 11:20

... restriction(eats allValuesFrom (herbivore))) Class(plant partial annotation(rdfs:comment "Plants form a class disjoint from animals.")) Class(tasty-plant partial annotation(rdfs:comment "Tasty plants are ... annotation(rdfs:comment "Carnivores are exactly those animals that eat animals.") intersectionOf(animal restriction(eats someValuesFrom (animal)))) Class(giraffe partial annotation(rdfs...

Ngày tải lên: 14/08/2014, 11:20

... covers of our traditional Web In the previous chapter, we discussed the “what” of the Semantic Web This chapter examines the “why,” to allow you to understand the promise and the need to focus on these ... http://www.businessweek.com/bwdaily/dnflash/mar20 02/ nf20 020 327 _4579.htm Gartner Research Note T-17-5338, 20 August 20 02 CHAPTER Installing Custom Cont...

Ngày tải lên: 14/08/2014, 12:20

... for the technologies of Web services, and using HTTP as the underlying protocol, the world of Web services involves standard protocols to achieve the capabilities of access, description, and ... over the next 10 years with the advent of the Semantic Web Lastly, we turned a critical eye on the current state of XML meta data and why it is not enough...

Ngày tải lên: 14/08/2014, 12:20

... framework, and to provide scalable Web service mediation Together, both of these technologies have the potential to increase automated usability of Web services As we build ontologies (models of how ... embracing some of these core standards and marrying them with SOAP-based Web services Much of the growth, development, and future of Web services security i...

Ngày tải lên: 14/08/2014, 12:20

... top of RDF This layered approach to creating the Semantic Web has been presented by the W3C and Tim Berners-Lee as the Semantic Web Stack,” as displayed in Figure 5. 8 The base of the stack is the ... Ontologies and ontology languages like the Web Ontology Language (OWL), discussed in Chapter 8, are layered on top of RDF Many see ontologies as the killer...

Ngày tải lên: 14/08/2014, 12:20