2. What is Semantic ?
Capability
Applying knowledge to
Pragmatic
solve problems
Knowledge
Information in the context
Semantic
of humans
Information
Syntax Data in context
Data
• Information in the context of ...
• Based on data and information
Introduction 2
3. Example of a Knowledge Network
Design
A
IT
3
B
Database
1 C
2
Introduction Semantic Networks 3
4. Example of a Knowledge Network
Design
A
IT
3
B
Database
1 C
2
Is this a Semantic Network ?
Introduction Semantic Networks 4
5. Semantic Wiki
London is the capital city of London is the capital city of
[[England]] and of the [[United [[is capital of::England]] and
Kingdom]]. of the [[is capital of::United
... population of London was Kingdom]].
estimated 7,421,328. ... population of London was
... covers an area of 609 estimated [[popula-
square miles. tion:=7421328]].
... covers an area of
[[area:=1577303 km²]]
Introduction Semantic Networks 5
6. Example of a Knowledge Network
Design
A
IT
3
B
Database
1 C
2
Is this a Semantic Network ?
Introduction Semantic Networks 6
7. Example of a Knowledge Network
Employee of
Design
A
IT
3
Author of B Member of Subject of
Database
specialist of
1
subject C
2
Introduction Semantic Networks 7
8. Example of a Knowledge Network
Employee of Department of
Department of Design
A
IT
describes 3
Author of B Member of Subject of
Database Author of
Author of specialist of
1 Author of
describes subject C
2
Is this a Semantic Network ?
Introduction Semantic Networks 8
9. Example of a Knowledge Network
Employee of Department of
Department of Design
A
IT
describes 3
Author of B Member of Subject of
Database Author of
Author of specialist of
1 Author of
describes subject C
2
Introduction Semantic Networks 9
10. Example of a Knowledge Network
Employee of Department of
Department of Design
A
IT
describes 3
Author of B Member of Subject of
Database Author of
Author of specialist of
1 Author of
describes subject C
2
Introduction Semantic Networks 10
11. Example of a Knowledge Network
Employee of Department of
Department of Design
A
IT
describes 3
Author of B Member of Subject of
Database Author of
Author of specialist of
1 Author of
describes subject C
2
Is this a Semantic Network ?
Introduction Semantic Networks 11
12. Example of a Semantic Network
Employee of Department of
Department of Design
A
IT
describes 3
Author of B Member of Subject of
Database Author of
Author of specialist of
1 Author of
describes subject C
2
Introduction Semantic Networks 12
13. Standards of Semantic Networks
Semantic Web
> provides a common framework for automated processes
for sharing and (re-)using data across
>> application -
>> enterprise -
>> community - boundaries
> based on
>> RDF standard
(Resource Description Framework)
>> OWL
(Web Ontology Language)
>> Semantic Web Services
>> ...
Introduction Semantic Networks Standards 13
14. RDF Graphs
directed graphs consisting of
> subjects and objects
as nodes
> predicates (also called properties)
as directed named links (also called arcs)
Introduction Semantic Networks Standards 14
15. RDF Graphs
directed graphs consisting of
> subjects and objects
as nodes
> predicates (also called properties)
as directed named links (also called arcs)
Shakespeare
1564 - 1616
Subject
Object
Predicate
Romeo and Juliet
written by
Introduction Semantic Networks Standards 15
16. RDF / XML
used for formal specification of a semantic network
<rdf:RDF>
xmlns:rdf=http://www.w3.org/TR/PR-RDF-Syntax#
xmlns:s=”http://description.org/schema/”>
<rdf:Description about=”Romeo and Juliet”>
<s:Author>
<rdf:Description about=”Author”>
<rdf:type resource=”http://example.org/schema/Person”/>
<v:Name>Shakespeare</v:Name>
<v:Lifetime>1564 - 1616</v:Lifetime>
</rdf:Description>
</s:Author>
</rdf:Description>
</rdf:RDF>
Shakespeare
1564 - 1616
Subject
Object
Predicate
Romeo and Juliet
written by
Introduction Semantic Networks Standards 16
17. The End of that boring slide presentation !!!
We will start working NOW
17
