MDR for the Semantic Web: Supporting Ontology Concept

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MDR for the Semantic Web Supporting Ontology
Concept
JTC1 SC32N1638
SC32 Study Period Meeting Future Database
Needs Clearwater, Florida, USA February 06, 2007
Doo-Kwon Baik (baikdk_at_korea.ac.kr), Korea
University Dongwon Jeong (djeong_at_kunsan.ac.kr),
Kunsan Natl University Yixin Jing
(yixin_jing_at_korea.ac.kr), Korea
University SungKong Park (skpark_at_metarights.com),
MetaRight, Inc.
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Contents

• Background
• Issues
• Proposed Solution
• Conclusion

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Background

• Semantic Web (SW) and Ontology
• MDR, ISO/IEC 11179,
• is a flat structure (i.e., a set of data elements
  describing properties of data)
• has no relationships between data elements
• is not suitable for the Semantic Web environment
• should support ontology registration (i.e.,
  associations)
• An Ontology
• might be built by various description languages
  (e.g., OWL, RDF, Topic Maps, KIF, etc.)
• Its structure is defined using semantics (DEs) in
  a registry

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Issues

• Consequently, there might be two issues.
• Issue-1
• MDR should support the ontology concept for the
  Semantic Web, i.e., should be extended to
  register relationships (associations, predicates)
  between data elements Syntax registry
• Statements are also registered to a MDR
  registration center Semantic registry
• Issue-2
• An ontology description language-independent
  method should is also required

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Proposal Conceptual Structure
Issue-1
MDR (Metadata registry)
11179
data elements
Syntax Registry (MDR Predicates)
Concept Level
Semantic Registry (Individuals Predicates)
Instance Level
Issue-2
Description (Translation)
OWL
RDF
KIF
Topic Maps
etc.
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Model Definition for Issue-1

• Proposed Model (eCD, eDEC, VD, DE)
• ,where
• eCD  extended Conceptual Domain
• (CD_Ind, CD_Ass)
• eDEC  extended Data Element Concept
• (DEC_Ind, DEC_Ass)
• VD  Value Domain
• DE  Data Element
• The conceptual level contains the eCD and eDEC,
  while the representational level contains the VD
  and DE.
• The main extension to the current MDR is
  reflected with the CD_Ass and DEC_Ass, which are
  the association between the CD_Inds and between
  the DEC_Inds respectively.

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Overview of the MDR Use in SW


Syntax registry
Semantic registry
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Example Scenario

• There are two volumes of data, country and
  international organization.
• Two associations exist as follows
• One is the Relationship, depicts the relationship
  type between countries.
• The other is the Role which depicts the roles
  that a country may play in different
  international organizations.

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Example Scenario (cont.)

• eCD of the international relationship issue
• Under this eCD, several CD_Ind and CD_Ass are
  extracted to form a non coherent structure.
• Each CD_Ind/CD_Ass contains Value Meanings. A
  portion of the Value Meanings is shown in the
  Table
• eCD is used for syntax registry

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Example Scenario (cont.)

• eDEC of the international relationship issue
• The eDEC has the knowledge that Korea is a
  member of World Trade Organization, but not a
  member of UN Security Council.
• eDEC is used for semantic registry.

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Example Scenario (cont.)

• In eDEC of the international relationship issue
  
• The valid Value Meaning of the CD_Ass is not
  applicable to every that of the CD_Ind.
• For example,
• the Value Meaning member can not be used to
  connect the Value Meaning Korea and UN
  Security Council.
• Although member(Korea, UN Security Council) is
  compliant to the syntax defined by the eCD, it
  violates the truth.
• To guarantee the Value Meanings be combined to
  form knowledge with correct semantic meaning, the
  process for semantics registry will be carried out

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Example of DE (Issue-2)

• Fragments of specification in OWL for eDEC
• Of course, we can define the specification in
  Topic Maps as TM is an element of VD

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Conclusion?

• We proposed a enhanced MDR model for ontology
  registry for the Semantic Web
• Issues for standardization?
• How to support ontology concept using registries
  for the Semantic Web
• The enhanced registry model
• Registration process Syntax registration and
  Semantic registration
• How to use metadata enhanced registry to describe
  a representation (OWL, RDF, TM, etc)
• Description process
• Remaining issues to achieve the goals of proposed
  solution?
• . . . . . .

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Q/A
Thank you! Doo-Kwon Baik (baikdk_at_korea.ac.kr),
Korea University Dongwon Jeong (djeong_at_kunsan.ac.k
r), Kunsan National University Yixin Jing
(yixin_jing_at_korea.ac.kr), Korea
University SungKong Park (skpark_at_metarights.com),
MetaRight, Inc.