Improvement of semantic interoperability based on metadata registry mdr
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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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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

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


Why metadata needs

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


Information retrieval system based on metadata registry 1

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)


Information retrieval system based on metadata registry 2

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)


Metadata registry mdr

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


Metadata registry

Data Element Concept

Data Element

1:N

1:N

Object Class

Object Class

1:1

1:1

Property

Property

1:1

Representation

Metadata Registry


Schema repository

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


Terminology

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


Terminology reference system

Terminology Reference System

Concept

Terms

Context

Query

Processor

Local

Mapping

TRS 

trout

Salmo trutta

송어

Common name

Scientific name

Korean name


Summary 1

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)


Summary 2

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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