INTRODUCTION
0 Semantic web is a collaborative movement lead by

world wide web consortium

0 Aims to develop a “web of da...
PURPOSE
0 Enables user to find, share and combine information

more easily

0 Finding, combining and acting upon informati...
Limitations of HTML
0 Used to create structured documents by denoting

structural semantics

0 Provides a way to categoriz...
Solutions
0 Languages like RDF, OWL, XML
0 Non semantic web page:

<item>blog</item>
0 Semantic web page:
<item rdf:about=...
Challenges
0 Vastness

0 Vagueness
0 Uncertainty
0 Inconsistency
0 Deceit
2/24/2014

SEMANTIC WEB

6
Architecture

2/24/2014

SEMANTIC WEB

7
URI
0 URI is a string of characters used to identify a name of

a web resource

2/24/2014

SEMANTIC WEB

8
XML AND RDF
0 XML: A markup language used to define a set of rules

for encoding documents
0 RDF: A metadata model used fo...
RDFS
0 Intended to structure RDF resources

0 Classes:
 rdfs:Resource,
 rdfs:Class,
 rdfs:Literal
0 Properties:
 rdfs:...
SPARQL & RIF
0 SPARQL is an RDF query language
PREFIX foaf: <http://xmlns.com/foaf/0.1/>
SELECT ?name ?email
WHERE { ?pers...
Projects
DBpedia:
0 Aiming to extract structured information
0 Allows users to query relationships and properties

associa...
Examples
0 Facebook Graph
0 Google Knowledge Graph

2/24/2014

SEMANTIC WEB

13
PROS & CONS
PROS:
0 Personlisation
0 Artificial Intelligence
0 Mobility
0 The Semantic Web

0 User friendly

CONS:
0 Since...
Disadvantages
0 Since it is a distributional model, so might not be an

efficient representation
0 An Expertise is require...
Conclusion
0 Human has to define the concepts, things and events
0 Even though the vision is far away but the important

s...
Semantic web
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Semantic web

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Semantic web is a collaborative movement lead by world wide web consortium which aims to develop a “web of data”
It is build on the w3c’s Resource Description Framework and standard definition coined by Tim Berners Lee

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  • Vision: A mere data is useless unless it is analyzed
  • Html cannot specify how one data is related to other
  • Sparql: rdf query lang—RDFS: RDF Schema---RIF: Rule Interchange Format----
  • Semantic web

    1. 1. INTRODUCTION 0 Semantic web is a collaborative movement lead by world wide web consortium 0 Aims to develop a “web of data” 0 It is build on the w3c’s Resource Description Framework 0 Standard definition coined by Tim Berners Lee 2/24/2014 SEMANTIC WEB 2
    2. 2. PURPOSE 0 Enables user to find, share and combine information more easily 0 Finding, combining and acting upon information on web by machines 0 Understanding the requirements of the based upon the semantically structured web 0 Tim Berners-Lee’s vision for a semantic web 2/24/2014 SEMANTIC WEB 3
    3. 3. Limitations of HTML 0 Used to create structured documents by denoting structural semantics 0 Provides a way to categorize the content on the web pages through metadata tags 0 Example: <meta name="author" content="John Doe" /> 0 Extending HTML syntax to create machine readable semantic markup 2/24/2014 SEMANTIC WEB 4
    4. 4. Solutions 0 Languages like RDF, OWL, XML 0 Non semantic web page: <item>blog</item> 0 Semantic web page: <item rdf:about="http://example.org/semanticweb/">Semantic Web</item> 2/24/2014 SEMANTIC WEB 5
    5. 5. Challenges 0 Vastness 0 Vagueness 0 Uncertainty 0 Inconsistency 0 Deceit 2/24/2014 SEMANTIC WEB 6
    6. 6. Architecture 2/24/2014 SEMANTIC WEB 7
    7. 7. URI 0 URI is a string of characters used to identify a name of a web resource 2/24/2014 SEMANTIC WEB 8
    8. 8. XML AND RDF 0 XML: A markup language used to define a set of rules for encoding documents 0 RDF: A metadata model used for conceptual description of information SUBJECT 2/24/2014 PREDICATE SEMANTIC WEB OBJECT 9
    9. 9. RDFS 0 Intended to structure RDF resources 0 Classes:  rdfs:Resource,  rdfs:Class,  rdfs:Literal 0 Properties:  rdfs:domain,  rdfs:subClassOf  rdfs:subPropertyOf 2/24/2014 SEMANTIC WEB 10
    10. 10. SPARQL & RIF 0 SPARQL is an RDF query language PREFIX foaf: <http://xmlns.com/foaf/0.1/> SELECT ?name ?email WHERE { ?person a foaf: Person. ?person foaf: name ?name. ?person foaf: mbox ?email. } 0 RIF is used to exchange rules between the resources 2/24/2014 SEMANTIC WEB 11
    11. 11. Projects DBpedia: 0 Aiming to extract structured information 0 Allows users to query relationships and properties associated with information FOAF: 0 Describes the relationships people have to other people 0 connects people based on their jobs and the items important to their lives 2/24/2014 SEMANTIC WEB 12
    12. 12. Examples 0 Facebook Graph 0 Google Knowledge Graph 2/24/2014 SEMANTIC WEB 13
    13. 13. PROS & CONS PROS: 0 Personlisation 0 Artificial Intelligence 0 Mobility 0 The Semantic Web 0 User friendly CONS: 0 Since it is a distributional model, so might not be an efficient representation 0 An Expertise is required to develop 2/24/2014 SEMANTIC WEB 14
    14. 14. Disadvantages 0 Since it is a distributional model, so might not be an efficient representation 0 An Expertise is required to develop 2/24/2014 SEMANTIC WEB 15
    15. 15. Conclusion 0 Human has to define the concepts, things and events 0 Even though the vision is far away but the important steps are achieved such as RDF and OWL 0 There are much to be fulfilled as the knowledge on the web is vast 2/24/2014 SEMANTIC WEB 16

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