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Semantic Networks Cork Oct 2009

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Semantic Networks

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Semantic Networks Cork Oct 2009

  1. 1. Workshop on Semantic Networks in Practise Roland Boeving / Robert Loew roland.boeving@h-da.de / robert@loew.com
  2. 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. 3. Example of a Knowledge Network Design A IT 3 B Database 1 C 2 Introduction Semantic Networks 3
  4. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 17. The End of that boring slide presentation !!! We will start working NOW 17

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