Semantic Web: A Primer

Semantic Web, Web 2.0 & Where from here ? Presentation by Narain, Founder & CEO 360 Degree Interactive Gnunify '07, Pune, 28 th Jan. 2007,

What is Semantic Web ? The Semantic Web is an evolution of the World Wide Web in which information is machine processable (rather than being only human oriented), thus permitting browsers or other software agents to find, share and combine information for us more easily.

What makes Semantic Web ?

RDF / XML – Resource Description Framework

RDF is an XML-based standard for describing resources that exist on the web. RDF statements are often referred to as “triples” that consist of a subject, predicate, and object, which correspond to a resource (subject) a property (predicate), and a property value (object).

Ex. <http://xyz.org/#Narain> <http://xyz.org/#name> "Narain"

OWL – Web Ontology Language

OWL defines the types of relationships that can be expressed in RDF using an XML vocabulary to indicate the hierarchies and relationships between different resources.

SPARQL SPARQL Protocol and RDF Query Language

SPARQL is a RDF Query Language. RDF query language is a computer language able to retrieve and manipulate data stored in Resource Description Framework format.

Semantic Web stack Presentation by Narain, Founder & CEO 360 Degree Interactive 28 th Jan. 2007,

Web 2.0 & Semantics

Harnessing Collective Intelligence - Digg, del.icio.us

Network Effect - Flickr, YouTube, Mybloglog,

Sharabilty / Remixability – Mashups [APIs]

Meta Profile sharing – PeopleAggregator

Syndication – content, communication, commerce

Open standards, Open data – Open ID, RSS, Atom

Semantic Web Implementations Microformats Dublin Core meta data FOAF – Friend of a Friend Open ID Initiative

SemWeb – Microformats <div class=" vcard "> < span class="fn" >Narain </span> < div class="org" >360 Degree Interactive</div> <a class="email" href="mailto:narain@360in.com">narain@360in.com</a> < div class="adr" > < div class="street-address" >16 Dr. Sadasivam Road</div> < span class="locality" >Chennai</span> , < span class="postal-code" >600017</span> < span class="country-name" >India</span> </div> < div class="tel" >+91-98401 08007</div> </div>

SemWeb – Dublin Core meta data <?xml version="1.0"?> <!DOCTYPE rdf:RDF PUBLIC "-//DUBLIN CORE//DCMES DTD 2002/07/31//EN" "http://dublincore.org/documents/2002/07/31/dcmes-xml/dcmes-xml-dtd.dtd" > <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/"> <rdf:Description rdf:about="http://gnunify.symbiosis.edu/"> <dc:title>Gnunify'07</dc:title> <dc:creator>Narain</dc:creator> <dc:publisher>Symbiosis Institute</dc:publisher> <dc:date>2007-01-28</dc:date> </rdf:Description> </rdf:RDF>

SemWeb – FOAF <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:admin="http://webns.net/mvcb/"> <foaf:PersonalProfileDocument rdf:about=""> <foaf:maker rdf:resource="#me"/> <foaf:primaryTopic rdf:resource="#me"/> <admin:generatorAgent rdf:resource="http://www.ldodds.com/foaf/foaf-a-matic"/> <admin:errorReportsTo rdf:resource="mailto:leigh@ldodds.com"/> </foaf:PersonalProfileDocument> <foaf:Person rdf:ID="me"> <foaf:name>Narain Rajagopalan</foaf:name> <foaf:title>Mr. </foaf:title> <foaf:givenname>Narain</foaf:givenname> <foaf:family_name>Rajagopalan</foaf:family_name> <foaf:mbox_sha1sum>28344f8ad11af1649448ffa6bf2c419c02c653ad</foaf:mbox_sha1sum> <foaf:homepage rdf:resource="http://rlnarain.blogspot.com"/> <foaf:workplaceHomepage rdf:resource="http://www.360in.com"/></foaf:Person> </rdf:RDF>

SemWeb – Open ID OpenID is an open, decentralized, free framework for user-centric digital identity . OpenID starts with the concept that anyone can identify themselves on the Internet the same way websites do-with a URI/URL. Since URIs are at the very core of Web architecture, they provide a solid foundation for user-centric identity. Ex. http://narain.myopenid.com Open ID Acceptance: Technorati, userstyles.org, Wikitravel, Zoomr, MoveableType, LiveJournal, Runlog, Imageshack, Wikidentiy, Hampr and more!

Tools of Semantic Web Simile Project Piggy Bank IBM's Many Eyes Semantic Bank

Shameless self-promotion :) The Knowledge Foundation The most passionate group of technologists, entrepreneurs, bloggers, and artisans that you can find in Chennai, who have come together to spruce up life in the activity-horizon of Chennai. Bar Camp Chennai [Apr 2006] Blog Camp [Aug 2006] Proto.in [Jan 2007] - www.proto.in Wiki Camp [Feb 2007] -www.wikicamp.in

References