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i here describe the semantic web and its features in an different style, some slides will be not clear, and if downloaded you will understand it
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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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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
