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SEMANTIC WEB

By Ramesh

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A trip to China!!!

Wow

Proper Flight with good reputation

Intermediate Airline

Lowest Fare

Luxurious

Intermediate

Cheap

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Chinese????

Initial Phase

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Languages

Specialized site

Social travel site

Images

Intermediate Phase

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Airline

Hotel

Language

Specialized site

Social travel site

Images

SearchedMergedSorted

Final Phase

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Data Base

Is this what the site offers???

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Web Of Data

Publish Data

Standard approachAnalogous approach

A.Com****

some.Com****

Searching

Pen Drive

Pen Drive

not be forced to make targeteddevelopments

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Web Of DataDB1

DB2

DB3

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So semantic Web is..

Collection of Technologies

“Web Of Data”

To Realize

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Web 2.0Semantic

Web

Are they same????

Its all about people and communication

It is focuses on machines

Collaboration and Sharing

Standard and Technologies

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Are they Different????

World Wide Web

Semantic Web

WWWSemantic

Web

ExtensionAdds

new data and metadata to existing Web documents

Extension of Web documents to data

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So what it aims at???

I know What you mean……

The goal of the semantic web is to be “a web talking to machines”

Providing meaningful information

Supplying the web withformalized knowledge in addition to its actual informal content

Designing a framework for interoperability

accessible by computers.

In short aims at……….

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Requirements

InteroperabilityRealization of a semantic web will require several layers of developments

Client Devices

Applications

Resources

Languages

Infrastructure

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Approaches to Semantic Web

WWWSemantic

Web

BUSINESS & PROFESSIONALElectronic commerceBioinformatics

Knowledge Biological data

PERSONALPersonalizationGathering and filtering

relevant information

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Building Blocks of Semantic Web

Semantic Web

RDF

Ontology

Languages And

inferences

Knowledge Representation

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Resource Description Framework

RDF???RDF???

Framework METADATADescribes

Developed byDeveloped by

Developed forDeveloped for

Providing interoperability among applications that exchange machine-understandable information on the Web

site's sitemapdates of updates

Developed under the guidance of the World Wide Web Consortium

Allow developers to build search engines that rely on the metadata

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ResourceResource 2

Resource 3

Property Type1

Property Type2

Property Type3

Property Type4

“Atomic Value”“Atomic Value”

RDF Data Model

RDF provides a model for describing resources

RDF Description

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An example

Consider this statements"The author of Document 1 is David““David is the author of Document 1"

Document1 “David”Author

Resource

Property-Type

Value

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Document1

David

Author_001Author

NameEmail id

david@.comSome ltd

One step further

Company

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An ontology is a formal conceptualization of a domain that is usable by a computer

Ontologies

involves an explicit description of

domain structure terms used to describe the domain

Allows applications to agree on the terms when communicating

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Ontology lifecycle

Conceptual Refinement

Ontology

Initial Design Evaluation EvolutionRequirement analysis

Creating Domain

Key issue- Specificity and reusability

Analyzing the resources

Creating Reusable Domain

Semi-automatic mechanism

Lack of tools

Formal evaluationAgreement between ontologies

DeploymentMaintenanceManagementCompetency

questions,

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Languages and inferences

“languages are necessary for expressing the content of thesemantic web”

Semantic Web

LanguagesStandardizing syntaxPrecise Semantics

Inference Engines

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Major Challenges in Languages

Different modeling styles

LogicObjectsConstraints from AIView-Queries

Identity Non-ambiguous names-

URIIdentifying objects of

same domain

ModularityRe-use of resourcesExtracting of section on

ontology

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0Knowledge Representation

DB1Semantic

Web

Structured collections of information

sets of inference rules

Automated reasoning

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A for????????

Two section will be benefited when semantic web evolves

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Thank you