Chapter 8 Conclusion and outlook Grigoris Antoniou Frank van Harmelen 1 Chapter 8 A Semantic Web Primer
1 Chapter 8 A Semantic Web Primer Chapter 8 Conclusion and Outlook Grigoris Antoniou Frank van Harmelen
How it All Fits Together Scenario: Bargaining among personal software agents Each party represented by a software agent They commit to shared understanding of terms: an ontology(e.g in RDFS or OWL) e Case facts offers and decisions are represented as RDF statements Chapter 8 A Semantic Web primer
2 Chapter 8 A Semantic Web Primer How it All Fits Together Scenario: Bargaining among personal software agents ⚫ Each party represented by a software agent ⚫ They commit to shared understanding of terms: an ontology (e.g. in RDFS or OWL) ⚫ Case facts, offers and decisions are represented as RDF statements
How it All Fits Together(2) o Information is exchanged in some XML based language(or RDF-based language) o Agent negotiation strategies are described in a logical language o Agents decide about next course of action through inference, based on negotiation strategy, case facts and previous offers and counteroffers 3 Chapter 8 A Semantic Web primer
3 Chapter 8 A Semantic Web Primer How it All Fits Together (2) ⚫ Information is exchanged in some XMLbased language (or RDF-based language) ⚫ Agent negotiation strategies are described in a logical language ⚫ Agents decide about next course of action through inference, based on negotiation strategy, case facts and previous offers and counteroffers
Web Ontology Language: Is Less More? In the beginning the focus was more on expressive power Simpler languages have advantages More efficient reasoning support Easier to learn and apply Easier for tool vendors to suppor rt OWL Lite is a step in this direction Chapter 8 A Semantic Web primer
4 Chapter 8 A Semantic Web Primer Web Ontology Language: Is Less More? ⚫ In the beginning the focus was more on expressive power ⚫ Simpler languages have advantages: – More efficient reasoning support – Easier to learn and apply – Easier for tool vendors to support ⚫ OWL Lite is a step in this direction
Rules and Ontologies Rules are orthogonal to description logics One could try to combine them Computational problems Rule-based languages as alternatives to OWL? Rule-based systems on top of ontology languages 5 Chapter 8 A Semantic Web primer
5 Chapter 8 A Semantic Web Primer Rules and Ontologies ⚫ Rules are orthogonal to description logics ⚫ One could try to combine them – Computational problems ⚫ Rule-based languages as alternatives to OWL? ⚫ Rule-based systems on top of ontology languages