1. Extending the Metadata Registry for Semantic Web - Enforcing the MDR for supporting ontology concept - May 28, 2008 ISO/IEC JTC 1/SC 32 WG 2 Meeting Sydney, Australia Dongwon Jeong, Kunsan National University, djeong@kunsan.ac.krdjeong@kunsan.ac.kr Doo-Kwon Baik, Korea University, baikdk@korea.ac.krbaikdk@korea.ac.kr

2. ISO/IEC JTC 1/SC 32 WG 2: Extending the MDR for Semantic Web Background  ISO/IEC 11179, MDR (Metadata Registry) Consistent data management within an organization or group of organizations Development of Metadata registries based on ISO/IEC 11179  Semantic Web Extension of the current Web Ref.: Wikipedia, http://en.wikipedia.org/wiki/Semantic_Web –The Semantic Web is an evolving extension of the World Wide Web in which the semantics of information and services on the web is defined, making it possible for the web to understand and satisfy the requests of people and machines to use the web content.  Web Ontology Core component for Semantic Web Consists of classes, properties, instances, etc. Description: RDF, RDF-S, OWL 1

3. ISO/IEC JTC 1/SC 32 WG 2: Extending the MDR for Semantic Web Motivation  Web ontology required for implementing Semantic Web includes many metadata There is a need to register these metadata, i.e., Web ontology including concepts, relations, and instances.  However, The current MDR can not support to register these, for example Property’s relation Restriction intersectionOf  So, we need….

4. ISO/IEC JTC 1/SC 32 WG 2: Extending the MDR for Semantic Web Purpose  Extension of the Current MDR for sharing and exchanging knowledge between MDR and Web Ontology  The Extended MDR provides a mechanism to create MDR-based Web ontology provides a scheme to register Web ontologies into the MDR. Web Ontology Extension MDR (ISO/IEC 11179) Share and exchange knowledge

5. ISO/IEC JTC 1/SC 32 WG 2: Extending the MDR for Semantic Web How to do  Analysis of Mapping Relations between OWL and MDR Analyze relationships defined in MDR Relations (i.e., vocabularies) defined in OWL Components in MDR mapped with Class in OWL  Definition of a Mapping Mechanism between OWL and MDR OWL  MDR –To register Web ontology in a MDR MDR  OWL –To make a Web ontology based on MDR 4

6. ISO/IEC JTC 1/SC 32 WG 2: Extending the MDR for Semantic Web Relationships in MDR Object Class Concept_Relationship Data_Element_Concept Data_Element_Concept_Relationship Conceptual_Domain Conceptual_Domain_Relationship OC Property OC Property

7. ISO/IEC JTC 1/SC 32 WG 2: Extending the MDR for Semantic Web Mapping between MDR & OWL Relations in OWL Object Property Datatype Property Map Object Property with Concept Relationship Class Object Property OWLMDR Object Class Concept Relation Map Datatype Property with Data Element Class Datatype Property OWLMDR Object ClassValue Domain Data Element

8. ISO/IEC JTC 1/SC 32 WG 2: Extending the MDR for Semantic Web Example of Mapping : between OWL ObjectProperty & Concept_Relationship DEC CD DEVD Conceptual Level Representational Level OC Property + Datatype value_domain_ relationship VD_Relationship Unit of Measure Concept_Relationship Concept Semantic Web Level FullProfessorStudent teaches PID String Name Major Int SID String Name Major Int OWL Class

9. ISO/IEC JTC 1/SC 32 WG 2: Extending the MDR for Semantic Web Example of mapping : between OWL DatatypeProerty & DataElement DEC CD DEVD Conceptual Level Representational Level OC Property + Datatype value_domain_ relationship VD_Relationship Unit of Measure Concept_Relationship Concept Semantic Web Level FullProfessorStudent teaches PID String Name Major Int SID String Name Major Int OWL Class

10. ISO/IEC JTC 1/SC 32 WG 2: Extending the MDR for Semantic Web Future Issues  Definition about the Relations between Properties in OWL  Consideration of Anonymous Class (AC) in OWL There is no Id For example, a class is intersectionof three classes using AC  And … Class AC Class 1 Class 2 Class 3 Intersectionof

11. ISO/IEC JTC 1/SC 32 WG 2: Extending the MDR for Semantic Web Summary  The current MDR does not support to register metadata of Web Ontology  The proposal, Extend MDR provides Registration scheme of Web ontology MDR-based Web ontology building mechanism