1. MDR for the Semantic Web: Supporting Ontology Concept
JTC1 SC32N1638
MDR for the Semantic Web: Supporting Ontology Concept
SC32 Study Period Meeting: Future Database Needs
Clearwater, Florida, USA
February 06, 2007
Doo-Kwon Baik Korea University
Dongwon Jeong Kunsan Nat’l University
Yixin Jing Korea University
SungKong Park MetaRight, Inc.

2. Software System Lab., Korea University
Contents
Background
Issues
Proposed Solution
Conclusion
2018/9/20
Software System Lab., Korea University

3. Software System Lab., Korea University
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
The changes to MDR are present in three aspects
the way to present registry framework is changed from UML to OWL
2. the original MDR supports to register flat text, while the XMDR support ontology registration
3. get support from other software, such as Jena and Lucene.
2018/9/20
Software System Lab., Korea University

4. Software System Lab., Korea University
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
2018/9/20
Software System Lab., Korea University

5. 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)
KIF
Topic
Maps
OWL
RDF
etc.
2018/9/20
Software System Lab., Korea University

6. 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.
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.
2018/9/20
Software System Lab., Korea University

7. Overview of the MDR Use in SW
Syntax registry
Semantic registry
The conceptual level, including eCD and eDEC, focuses on the metadata’s semantics registry. The conceptual level excludes the representations registry, only registers the concept meaning of the knowledge. In the conceptual level, eCD provides the domain description for the eDEC.
Representational Level is required, which aims to register the metadata of the representation used to express the concepts in the conceptual level. The Representational Level consists of Value Domain (VD) and Data Element
2018/9/20
Software System Lab., Korea University

8. Software System Lab., Korea University
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.
2018/9/20
Software System Lab., Korea University

9. 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
2018/9/20
Software System Lab., Korea University

10. 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.
2018/9/20
Software System Lab., Korea University

11. 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
2018/9/20
Software System Lab., Korea University

12. Software System Lab., Korea University
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
2018/9/20
Software System Lab., Korea University

13. Software System Lab., Korea University
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?
2018/9/20
Software System Lab., Korea University

14. Software System Lab., Korea University
Q/A
Thank you!
Doo-Kwon Baik Korea University
Dongwon Jeong Kunsan National University
Yixin Jing Korea University
SungKong Park MetaRight, Inc.
2018/9/20
Software System Lab., Korea University