Semantic web

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Semantic web is a collaborative movement lead by world wide web consortium which aims to develop a web of data It is build on the w3cs Resource Description Framework and standard definition coined by Tim Berners Lee

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<ul><li> 1. INTRODUCTION 0 Semantic web is a collaborative movement lead byworld wide web consortium0 Aims to develop a web of data 0 It is build on the w3cs Resource DescriptionFramework0 Standard definition coined by Tim Berners Lee 2/24/2014SEMANTIC WEB2</li></ul> <p> 2. PURPOSE 0 Enables user to find, share and combine informationmore easily0 Finding, combining and acting upon information onweb by machines0 Understanding the requirements of the based uponthe semantically structured web0 Tim Berners-Lees vision for a semantic web 2/24/2014SEMANTIC WEB3 3. Limitations of HTML 0 Used to create structured documents by denotingstructural semantics0 Provides a way to categorize the content on the web pagesthrough metadata tags0 Example: 0 Extending HTML syntax to create machine readablesemantic markup2/24/2014SEMANTIC WEB4 4. Solutions 0 Languages like RDF, OWL, XML 0 Non semantic web page:blog 0 Semantic web page: Semantic Web2/24/2014SEMANTIC WEB5 5. Challenges 0 Vastness0 Vagueness 0 Uncertainty 0 Inconsistency 0 Deceit 2/24/2014SEMANTIC WEB6 6. Architecture2/24/2014SEMANTIC WEB7 7. URI 0 URI is a string of characters used to identify a name ofa web resource2/24/2014SEMANTIC WEB8 8. XML AND RDF 0 XML: A markup language used to define a set of rulesfor encoding documents 0 RDF: A metadata model used for conceptual description of informationSUBJECT2/24/2014PREDICATESEMANTIC WEBOBJECT9 9. RDFS 0 Intended to structure RDF resources0 Classes: rdfs:Resource, rdfs:Class, rdfs:Literal 0 Properties: rdfs:domain, rdfs:subClassOf rdfs:subPropertyOf 2/24/2014SEMANTIC WEB10 10. SPARQL &amp; RIF 0 SPARQL is an RDF query language PREFIX foaf: SELECT ?name ?email WHERE { ?person a foaf: Person. ?person foaf: name ?name. ?person foaf: mbox ?email. }0 RIF is used to exchange rules between the resources2/24/2014SEMANTIC WEB11 11. Projects DBpedia: 0 Aiming to extract structured information 0 Allows users to query relationships and propertiesassociated with informationFOAF: 0 Describes the relationships people have to other people 0 connects people based on their jobs and the itemsimportant to their lives2/24/2014SEMANTIC WEB12 12. Examples 0 Facebook Graph 0 Google Knowledge Graph2/24/2014SEMANTIC WEB13 13. PROS &amp; CONS PROS: 0 Personlisation 0 Artificial Intelligence 0 Mobility 0 The Semantic Web0 User friendlyCONS: 0 Since it is a distributional model, so might not be an efficient representation 0 An Expertise is required to develop 2/24/2014SEMANTIC WEB14 14. Disadvantages 0 Since it is a distributional model, so might not be anefficient representation 0 An Expertise is required to develop2/24/2014SEMANTIC WEB15 15. Conclusion 0 Human has to define the concepts, things and events 0 Even though the vision is far away but the importantsteps are achieved such as RDF and OWL0 There are much to be fulfilled as the knowledge on theweb is vast2/24/2014SEMANTIC WEB16 </p>