The semantic web
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Transcript of The semantic web
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GUIDE : - PRFO. P.R. BARAPATREBY
ABHIJIT C. MANEPATILROLL NO. - CE19
Semantic Web
SKN SIT, LONAVALA
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Contents
Introduction.History.Layered approach of Semantic Web.Content of Semantic Web.Need of Semantic Web. Issues and Challenges.Conclusion.References.
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Introduction
Definition :
"The Semantic Web is an extension of the current web in which information is given well-defined meaning, better enabling computers and people to work in co-operation.”
It is the web of data that can be processed directly & indirectly by machine.
It Defines the things in the way that computer application can understand it.
Developed by Tim Berner lee.
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Conti…
Web has millions of documents with each one has set of terms.
Terms are used to search the documents.
E.g. Book written by jone.
Semantic web allows to search exact result.
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History
Web 1.0 Read Only era Static Pages. e.g.. Wikipedia
Web 2.0 Dynamic Pages Active Interaction e.g. Facebook, You Tube.
Web 3.0 Next Evolution
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Web 3.0
Semantic Web Machine Understandable Intelligence web More Active Interaction Defines the specific syntax for web
1) common format for integration & combination of data
2) It is also about the language for recording that how the data
relates to real world objects.
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Layered Approach of Semantic Web
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Components of the Semantic Web
XML
Uniform Resource Identifier (URI)
Resource Description Framework (RDF)
Resource Description Framework Schema (RDFS)
Web Ontology Language (OWL)
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XML
HTML and XML
XML with structured information
XML shows the relationship betn terms of documents
Which is machine understandable every peace of info. Is described.
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Uniform Resource Identifier (URI)
Web identifier : like string starting with http or ftp
Anyone can create a URI
Every resource has URI or a web address
URI defines the web location
Anything that has a URI is “On the Web’’
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Resource Description Framework (RDF)
Family of W3C designed as metadata model.General Methods for conceptual description
or modeling of information.(Syntax)Similar to the ER or Class diagramsShows the relationship between Subject-
Predicates-Object (triples)E.g. ‘The Sky has the color blue’RDF abstract model with serialization format
(ie file format)
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RDF Schema
Extensible knowledge representation language.
Abhijit Pune
RDF
Subject Object
(Predicate)
Stays in
Voting Citizen
Non Voting Citizen
Citizen States
Country
CityTown
Taluka
involes
RDFStype
subclass subclass
RangeDomain
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Web with RDF
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OWL (Web Ontology Language )
An ontology is an explict and formal specification of a conceptualization.
It consist of finite list of terms and relationship betn them.
Shared understanding Orgnizing and mapping wesiteImproves the accuracy of web search
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Issues and Challenges
It’s Too Complex The RDF model is felt to be complex The RDF representation in XML looks complex
Industry Isn’t Interested The Semantic Web won’t take off unless the IT sector
develops toolsIts Too Researchy
The Semantic Web is an idea for the AI research community and not for mainstream use
Consensus Not Yet Reached On Architectural Approach There is still debate on RDF, patent issues, etc.
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Scope
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Conclusion
To conclude: The first version of the Web lacked a metadata framework
which was needed to describe resources W3C developed RDF to provide this framework Semantic web is the Future of Internet which will expected
to rewrite the internet as we know Change the way of information search on web Semantic web can overcome all the traditional problems to
provide a better and rich user experience to consumers all over the world.
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References
• IEEE Internet Computing The Semantic Web: The Roles of XML
and RDF Stefan Decker And Sergey Melnik Stanford University.
• IEEE INTELLIGENT SYSTEMS Ontology Languages for the
Semantic Web Asunción Gómez-Pérez and Oscar Corcho,
Universidad Politécnica de Madrid.
• IEEE Published by the IEEE Computer Society:
Semantics Scales Up Beyond Search in Web 3.0
• T. Berners-Lee. Semantic Web Road Map
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THANK YOU