Presented to –                     Presented by-Mr. Shreyaskar Gaur                Pallavi SrivastavaAssistant Professor  ...
Contents           W3C       Semantic web   Semantic web themes      Technology map        ApplicationsAdvantages and disa...
W3CInternational consortium directed by Tim Berners-LeeMission: “Lead the Web to its full potential”Hosts: MIT, ERCIM, Kei...
Need of semantic web
Semantic web   “The Semantic Web is a major research initiative of the World WideWeb Consortium (W3C) to create a metadata...
Semantic WebData Integration at Web ScaleWeb of data  framework for integrating multiple sources  to draw new conclusions ...
Today, the W3C positions the Semantic Web into a number  of areas:
Semantic web themesLinked data Data on the Web should be available in a standard format. Relationships among data should b...
Semantic web themesInference* Automatic procedures can generate new  relationships.* Used for data integration on the Web,...
Data Integration in Semantic web 1. Map the various data onto an abstract data representation       make the data independ...
Technology map
RDF RDF(Resource Description Framework) is the first and the fundamental technology of semantic web. It describes Resource...
RDF & RDFS    Another significant part of RDF is it’s    Schema language. RDF Schema allows for    greater specification o...
RDF example                             Has road                                        Garden st.     In Suburb          ...
OWL Declarative knowledge representationlanguage for the Semantic Web withformally defined meaning for creatingontologies....
SPARQLSPARQL query language and the accompanyingsemantics and protocols makes possible to send                PREFIX ns: <...
GRDDL & POWDERGRDDL* GRDDL is a mechanism for Gleaning Resource Descriptions from Dialects of Languages.* introduces marku...
Rule Interchange Format Family of specifications which focuses on exchange rather  than a single one-fits-all rule langua...
Tools                 Categories                                            The following Semantic Web tools              ...
Advantages
Disadvantages
Current newsBased in Los Angeles, Cognition Technologies hasdeveloped innovative Semantic Natural LanguageProcessing (NLP)...
Future AspectThe semantic web is driving the evolution of current web byenabling users to find ,share & combine informatio...
Semantic web is about an individual.Searches: With semantic search engines we can receiveright information/content at the ...
References:www.w3.org>W3Cwww.readwriteweb.comSemantic Web - Wikipedia, the free encyclopediaen.wikipedia.org/wiki/Semantic...
Queries…
Semantic web
Semantic web
Semantic web
Semantic web
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Semantic web
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  • PREFIX ns: &lt;http://road.com/&gt; SELECT ?name WHERE { ?road ns:inSuburb “Eveleigh” . ?road ns:hasName ?name . } The results would be: “Garden St” “Central Ave”
  • Semantic web

    1. 1. Presented to – Presented by-Mr. Shreyaskar Gaur Pallavi SrivastavaAssistant Professor B.Tech(C.S.E)Department of Computer Science & Semester-6Technology Roll no.- 0928210035JPIET
    2. 2. Contents W3C Semantic web Semantic web themes Technology map ApplicationsAdvantages and disadvantages Future scope Imaginative aspect
    3. 3. W3CInternational consortium directed by Tim Berners-LeeMission: “Lead the Web to its full potential”Hosts: MIT, ERCIM, Keio UniversityDefines Web Standards HTML, CSS, XML, Security Web Accessibility Initiative (WAI) Web Services (SOAP, WSDL, etc.) Semantic WebMethod Technical specifications developed with Working Groups and extensive public review Advanced Development to chart long term architectural directionsW3C track record: building infrastructure to addresstechnical and social needs of the Web
    4. 4. Need of semantic web
    5. 5. Semantic web “The Semantic Web is a major research initiative of the World WideWeb Consortium (W3C) to create a metadata-rich Web of resourcesthat can describe themselves not only by how they should bedisplayed (HTML) or syntactically (XML), but also by the meaning of themetadata.” From W3C Semantic Web Activity Page “The Semantic Web is an extension of the current web in whichinformation is given well-defined meaning, better enabling computersand people to work in cooperation.” Tim Berners-Lee, James Hendler, Ora Lassila, The Semantic Web, Scientific American, May 2001
    6. 6. Semantic WebData Integration at Web ScaleWeb of data framework for integrating multiple sources to draw new conclusions architecture for describing all kinds of things (items, collections, services, processes, etc.)Increase the utility of information byconnecting it to its definitions and itscontext effective management and reuse of data at various scales (personal, group, enterprise, community, web
    7. 7. Today, the W3C positions the Semantic Web into a number of areas:
    8. 8. Semantic web themesLinked data Data on the Web should be available in a standard format. Relationships among data should be made available, too, to create a Web of Data . Collection of interrelated datasets on the Web.Vocabulary- Concepts and relationships (also referred to as “terms”) used to describe and represent an area of concern. Used to- Classify the terms that can be used in a particular application. Characterize possible relationships. Define possible constraints on using those terms. The role are to help data integration. E.g. a:author same as f:auteurQuery Programmatic mechanisms to retrieve all the data.
    9. 9. Semantic web themesInference* Automatic procedures can generate new relationships.* Used for data integration on the Web, by- * discovering new relationships * automatically analyzing the content of the data * managing knowledge on the Web .Vertical applications Used to explore how Semantic Web technologies can help improve operations, efficiencies, and provide better user experiences. The two most prominent areas for Semantic Web adoption are Health Care/Life Sciences e-Government sectors
    10. 10. Data Integration in Semantic web 1. Map the various data onto an abstract data representation make the data independent of its internal representation 2. Merge the resulting representations 3. Start making queries on the whole! queries that could not have been done on the individual data sets
    11. 11. Technology map
    12. 12. RDF RDF(Resource Description Framework) is the first and the fundamental technology of semantic web. It describes Resources through a series of Statements. RDF has following important concepts• Resource : The resources being described by RDF are anything that can be named via a URI.• Property : A property is also a resource that has a name, for instance Author or Title.• Statement : A statement consists of the combination of a Resource, a Property, and an associated value. Each statement is a Property and Value that is about a Resource. An RDF Triple (s,p,o) is such that: “s”, “p” are URI-s, ie, resources on the Web; “o” is a URI or a literal “s”, “p”, and “o” stand for “subject”, “property”, and “objectResources can use any URI, e.g.: http://www.example.org/file.xml#element(home) http://www.example.org/file2.xml#xpath1(//q[@a=b])URI-s can also denote non Web entities: http://www.ivan-herman.net/me is me not my home page, not my publication list, but me
    13. 13. RDF & RDFS Another significant part of RDF is it’s Schema language. RDF Schema allows for greater specification of semantics for information models. RDFS defines resources and classes: everything in RDF is a “resource” “classes” are also resources, but… …they are also a collection of possible resources (i.e., “individuals”) “fiction”, “novel” Relationships are defined among classes <rdf:Description and resources: rdf:about="http://…/isbn/202038 6682"> “typing”: an individual belongs to a specific <f:titre xml:lang="fr">Le class palais des mirroirs</f:titre> “«The Glass Palace» is a novel” <f:original to be more precise: rdf:resource="http://…/isbn/000 “«http://.../000651409X» is a novel” 651409X"/> “sub classing”: all instances of one are also </rdf:Description> the instances of the other (“every novel is a fiction”) RDFS formalizes these notions in RDF
    14. 14. RDF example Has road Garden st. In Suburb IntersectionIn location Has road Central ave In Suburb Traffic Sydney accident Eveleigh In city
    15. 15. OWL Declarative knowledge representationlanguage for the Semantic Web withformally defined meaning for creatingontologies.It is a ‘Monotonic’ language.Collection of basic “pieces of knowledge.” Statements that are made in an ontology arecalled axioms in OWL. The ontology asserts that its axioms are true. OWL denotes:• objects as individuals,• categories as classes, and• relations as properties.
    16. 16. SPARQLSPARQL query language and the accompanyingsemantics and protocols makes possible to send PREFIX ns: <http://road.com/>queries and receive results . SELECT ?name WHERESPARQL queries are similar in syntax to SQL { based on the RDF triple models ?road ns:inSuburb “Eveleigh” provide patterns against such relationships in which . some resource references are variables. ?road ns:hasName ?name .A SPARQL engine would return the resources that }match these patterns for all triples.Under current development are a The results would be: SPARQL Update language Name SPARQL HTTP bindings “Garden St” discovery mechanism for describing the capabilities of a “Central Ave” SPARQL endpoint.
    17. 17. GRDDL & POWDERGRDDL* GRDDL is a mechanism for Gleaning Resource Descriptions from Dialects of Languages.* introduces markup based on existing standards for: * declaring that an XML document includes data compatible with the RDF * linking to algorithms (typically represented in XSLT), * extracting this data from the document.POWDER ( Protocol for Web Description Resources ) Supports the provision of description resources way to apply them to groups of online resources the authentication of those descriptions . There are two versions of POWDER: one simple version expressed in XML. the other that harnesses the Semantic Web languages (POWDER-S).SKOS An area of work developing specifications and standards to support the use of knowledge organization systems (KOS) such as thesauri, classification schemes, subject heading lists and taxonomies within the framework of the Semantic Web
    18. 18. Rule Interchange Format Family of specifications which focuses on exchange rather than a single one-fits-all rule language but even rule exchange alone is a complex and daunting area. Rule systems fall into three categories;  first-order  logic-programming  action rules Family of languages, called dialects. Core idea : Different rule systems will provide syntactic mappings from their native languages to RIF dialects and back. Mappings are required to be preserve their original semantics
    19. 19. Tools Categories The following Semantic Web tools have been recently released: InferenceTriple Stores Converters AceWiki (Version 0.5.3, 19 engines January 2012) LDIF (Version 0.4, 16 January Search 2012) Middleware CMS engines AllegroGraph (Version 4.4.0.1, 12 January 2012) Semantic Semantic MediaWiki (Version Development Semantic 1.7.0.1, 9 January 2012) Web environments Wikis browsers Bigdata (Version 1.1.0, 20 December 2011)
    20. 20. Advantages
    21. 21. Disadvantages
    22. 22. Current newsBased in Los Angeles, Cognition Technologies hasdeveloped innovative Semantic Natural LanguageProcessing (NLP) technology .A leading biopharmaceutical company has chosenSemantelli’s CoProtect software to manage its onlineand social media reputation.Semantic advertising web service ADmantX hasannounced a partnership with adBrite, “the largestindependent ad exchange, to offer brand safety,greater ad engagement and page-level, cookie-lesstargeting to advertisers and publishers.CitizenNet is using semantic analysis and naturallanguage processing to provide customers withautomatic social media promotion
    23. 23. Future AspectThe semantic web is driving the evolution of current web byenabling users to find ,share & combine information more easily.The US government has propelled the adoption of semantic webin governmental agencies.More than 2,70,000 data sets are available for public viewing withthe help of Data Gov project.At present , semantic web witnesses funding inflow for productdevelopment.In future, the investments are likely to be made in projects wherefocus is on enhancing the existing ecosystems on internetespecially in : Social computing Search engines enhancements Advertising Analytical toolsSemantic innovations relevant to thriving ecosystems such asFacebook & twitter stand better chance of attracting funds fromventure capalists & other funding agencies.Clarabridge,which delivers highly customized enterpriseprocessing solutions had acquired $4.33 million for marketing &sales expansion.
    24. 24. Semantic web is about an individual.Searches: With semantic search engines we can receiveright information/content at the right time fromanywhere.Once the Semantic Web exists, it can provide the abilityto tag all content on the Web, describe what each pieceof information is about and give semantic meaning tothe content item.Thus, search engines become more effective than theyare now, and users can find the precise informationthey are hunting.E-commerce : “We believe this is what you are looking”Online ad: “Personalized ad display based on userpreferences, community and other characteristics”.
    25. 25. References:www.w3.org>W3Cwww.readwriteweb.comSemantic Web - Wikipedia, the free encyclopediaen.wikipedia.org/wiki/Semantic WebTutorial ppt W3Chttp://www.w3.org/2001/sw/grddl-wg/
    26. 26. Queries…
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