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Improvement of Semantic Interoperability based on Metadata Registry(MDR)

Improvement of Semantic Interoperability based on Metadata Registry(MDR). Doo-Kwon Baik Dept. of CSE Korea University. Introduction. In DL, Federation of Index DB and Local DB is essential. Heterogeneity Schema Level(Data Element Level) Various Metadata Encoding Format

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Improvement of Semantic Interoperability based on Metadata Registry(MDR)

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  1. Improvement of Semantic Interoperability based on Metadata Registry(MDR) Doo-Kwon Baik Dept. of CSE Korea University

  2. Introduction • In DL, Federation of Index DB and Local DB is essential. • Heterogeneity • Schema Level(Data Element Level) • Various Metadata Encoding Format • Dublin Core, USMARC, KOMARC • Schema of Local DB • Terminology(Data Value Level) • Semantic Heterogeneity, bi-lingual

  3. Why Metadata Needs? • users and implementors need • a dictionary of terms • a place to publish project- or discipline-specific adaptations to share with colleagues and partners • metadata needs • to manage its namespace (as a standards agency) • to provide machine-readable schemas for loadinginto editors and search engines • to provide crosswalks to related schemas • to link the (english) standard to translations in other languages

  4. User Query & Result User Interface Query Processor MDR Analyzer Transformer Sub Query & Result Sub Query & Result Executer Integrator Schema Repository Metadata Dublin Core Metadata KOMARC MDR Manager TRS Schema Repository Manager Terminology Manager Digital Object Database A Digital Object Database B Information Retrieval System based on Metadata Registry(1)

  5. Information Retrieval Systembased on Metadata Registry(2) • Characteristics • Conceptual integration of index and local DB’s • Semantic interoperability based on • MDR(Metadata Registry) • SR(Schema Repository) • TRS(Terminology Reference System)

  6. Metadata Registry(MDR) • ISO/IEC 11179 – Metadata Registry • Framework for the Specification and Standardization of Data Elements • Classification of Data Elements • Metamodel of MDR • Rules and Guidelines for the Formulation of Data Definitions • Naming and Identification Principles for Data Elements

  7. Data Element Concept Data Element 1:N 1:N Object Class Object Class 1:1 1:1 Property Property 1:1 Representation Metadata Registry

  8. Schema Repository • Mapping local schema and semantic to MDR Metadata Registry Schema Repository LDB1 Data Element Concept Local DB1 Schema Global Schema LDB2 Local DB 2 Schema Data Element Data Element

  9. Terminology Any of several game fishes of the genus Salmo, related to the salmon Concept Terms Context trout Salmo trutta 송어 Common name Scientific name Korean name

  10. Terminology Reference System Concept Terms Context Query Processor Local Mapping TRS   trout Salmo trutta 송어 Common name Scientific name Korean name

  11. Summary(1) • Information Integration Problem of DL • Interoperability of heterogeneous DBs • Interoperability of multi-lingual DBs • Solution of Information Integration Problem • MDR (Metadata Registry) • SR (Schema Repository) • TRS (Terminology Reference System)

  12. Summary(2) • Needs of International Co-Work • Exchange of Research results • Discovery of cultural differences in the description of metadata • Improvement of Semantic Interoperability • Multi-lingual Extension of MDR • Multi-lingual Support of TRS • Sharing of Experimental Data Sets

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