The document discusses semantic networks and their applications. It provides examples of semantic networks that represent relationships between concepts using nodes and links. It also discusses standards for semantic networks, including RDF and OWL, which allow sharing and reusing data across applications and domains through a common framework. RDF uses a graph-based data model and XML syntax to formally specify semantic networks.

1. Workshop on
Semantic Networks
in Practise
Roland Boeving / Robert Loew
roland.boeving@h-da.de / robert@loew.com

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