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Semantic web
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- 2. ©TechKnowXpress WHAT IS SEMANTIC WEB? The SemanticWeb is an extension of the Web through standards by theWorld WideWeb Consortium (W3C)
- 3. ©TechKnowXpress ADVANTAGES OFSEMANTIC WEBOVER TRADITIONAL WEB Improve the understandability and interpretability ofdata for processing by machines Enables inference of new knowledge from existing information Integration of heterogeneous data
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- 6. ©TechKnowXpress RESOURCE DESCRIPTION FRAMEWORK (RDF) Standard model for datainterchange on theWeb. Facilitates data merging even if the underlying schemas differ. Supports the evolution of schemas over time without requiring all the data consumers to be changed.
- 7. ©TechKnowXpress RESOURCE DESCRIPTION FRAMEWORK (RDF) (conti…) RDF extendsthe linking structure of the Web to use URIs to name the relationship between things as well as the two ends of the link. Allows structured and semi-structured data to be mixed, exposed, and shared across different applications. RDFTriple: Rdf: subject. Rdf: predicate. Rdf: object.
- 8. ©TechKnowXpress RESOURCE DESCRIPTION FRAMEWORK SCHEMA (RDFS) RDFS is aset of classes with certain properties using the RDF extensible knowledge representation data model, providing basic elements for the description of ontologies
- 9. ©TechKnowXpress ONTOLOGIES An ontology isa formal specification of a shared conceptualization
- 10. ©TechKnowXpress TYPESOF ONTOLOGIES DOMAIN ONTOLOGY TASK ONTOLOGY APPLICATION ONTOLOGY TOP LEVEL ONTOLOGY Theontology which describes very general concepts across all knowledge domains is called top level ontology
- 11. ©TechKnowXpress TYPESOF ONTOLOGIES (conti…) DOMAIN ONTOLOGY TASK ONTOLOGY APPLICATION ONTOLOGY TOP LEVEL ONTOLOGY The ontologywhich provides a specification or detailed description of elements and relationships of tasks to explain how tasks can exist and be used in a specific field or environment.
- 12. ©TechKnowXpress TYPESOF ONTOLOGIES (conti…) DOMAIN ONTOLOGY TASK ONTOLOGY APPLICATION ONTOLOGY TOP LEVEL ONTOLOGY The ontology whichrepresents concepts belonging to part of the world is called domain ontology
- 13. ©TechKnowXpress TYPESOF ONTOLOGIES (conti…) DOMAIN ONTOLOGY TASK ONTOLOGY APPLICATION ONTOLOGY TOP LEVEL ONTOLOGY The ontologywhich is engineered for a specific use or application focus and whose scope is specified through testable use cases is called application ontology
- 14. ©TechKnowXpress SPARQL SPARQL Protocol And RDFQuery Language SPARQL is an RDF query language SPARQL allows for a query to consist of triple patterns, conjunctions, disjunctions and optional patterns SPARQL is able to retrieve and manipulate data stored in Resource Description Framework (RDF) format
- 15. ©TechKnowXpress OWL –WEB ONTOLOGY LANGUAGE TheWebOntology Language (OWL) is a family of knowledge representation languages for authoring ontologies. OWL exists in various flavors: OWL EL OWL RL OWL QL OWL2 DL OWL2 Full
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- 18. ©TechKnowXpress USEOFOWL (conti…) CORPORATE WEB SITE MANAGEMENT (1)AutomatedTaxonomical Organization of data and documents (2) Mapping Between Corporate Sectors (mergers!)
- 19. ©TechKnowXpress USEOFOWL (conti…) DESIGN DOCUMENTATION (1) Explicationof derived assemblies (2) Explicit Management of Constraints
- 20. ©TechKnowXpress USEOFOWL (conti…) INTELLIGENT AGENTS (1) ExpressingUser Preferences and/or Interests (2) Content Mapping between Web sites
- 21. ©TechKnowXpress USEOFOWL (conti…) WEB SERVICES AND UBIQUITOUSCOMPUTING (1)Web Service Discovery and Composition (2) Rights Management and Access Control
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