Extending the MDR for the Semantic Web Enforcing the MDR for supporting ontology concept

1
Extending the MDR for the Semantic Web-
Enforcing the MDR for supporting ontology concept
-

• 6 December 2007
• ISO/IEC SC 32/WG 2 Interim Meeting
• Seoul, Korea
• Dongwon Jeong (djeong_at_kunsan.ac.kr), Kunsan
  National University
• Doo-Kwon Baik (baikdk_at_korea.ac.kr), Korea
  University

2
Motivation and Background
MDR (ISO/IEC 11179)
Environment Change (Semantic Web)
Next?
An Extension of the MDR, which can support the
Semantic Web Concept
3
Motivation and Background (cont.)

• Semantic Web (SW) and Ontology
• Semantic Web
• is recognized as a next generation Web
  (Intelligent Web)
• To realize the Semantic Web, ontologies (Web
  Ontologies) should be built
• Web Ontology
• consists of classes, instances, properties
• Class Concept, Type
• Instance Individual, Object
• Property Relation, Role
• Ref. Lecture Notes Ontology Languages for the
  Semantic Web, http//www.cs.man.ac.uk/horrocks/Te
  aching/cs646/
• can be expressed as 3-tuple, ltsubject, predicate,
  objectgt
• Triple set (Statement set)

4
Motivation and Background (cont.)

• An Ontology Example
• Ref. RDF Primer W3C Recommendation 10 February
  2004

nancy
frank
hasMother
fred
Staff
frances
rdfssubClassOf
rdfssubClassOf
Male
Female
rdfssubClassOf
rdfssubClassOf
spencer
Person
author
cook
author
eatCheese
author
author
moveCheese
crisis
Book
5
Motivation and Background (cont.)

• The Ontology Example can be classified into two
  levels
• Class level and Instance level

nancy
frank
hasMother
fred
Staff
frances
rdfssubClassOf
rdfssubClassOf
Male
Female
rdfssubClassOf
rdfssubClassOf
spencer
Person
author
cook
author
eatCheese
author
author
moveCheese
crisis
Book
6
Motivation and Background (cont.)

• MDR Standardization Status
• ISO/IEC 11179 has been being extended for
  supporting the ontology concept
• The extension is for support the ontology concept
  at the class level
• No consideration at the instance level (WG2
  Note This is not true)
• A Key Region of the Extension Part (ISO/IEC 11179
  CD2, ED. 3)
• Relations Region

7
Purpose

• Main Goal of our Proposal
• Enforcing the current MDR for the Semantic Web by
  managing data at the instance level as well as at
  the concept level
• This Proposal is
• to support an ontology registration at the
  instance level as well as at the concept level
• to endow the MDR to more powerful reasoning
  ability
• to make it suitable for the Semantic Web
  environment
• to make it more practical

8
Progress Status

• Discussion History of the Proposal
• SC32 Study Periods Meeting, Clearwater, FL,
  February 2007
• SC32 Plenary and WG Meetings
• Request for a study period on Extending the
  metadata Registry for the Semantic Web
• Documents SC32N1659, WG2N1043
• In this Meeting, SC32/WG2 Interim Meeting
• More clear scope definition
• More details of our proposal
• Metamodels
• Registration processes
• Hope to get much more comments

9
Scope Conceptual Model
MDR (Metadata registry)
11179 Ed. 2
To support the ontology concept
11179 Part 3, Ed. 3 (Concepts Properties)
Proposal
Semantic (Instance, Individual)
Registry (Individuals Properties)
To support the ontology concept at the instance
level
register
Ontology Registration Process
For a standardized ontology registration
10
Scope Key Issues

• Metamodels for Data Management
• The following data should be managed
• Instances
• Mapping information between Concepts and
  Instances
• Relation information (properties) between
  instances
• Assumption (?)
• Concepts and relevant properties are managed by
  the current extension
• Ontology Registration Processes
• Main processes
• Concept-to-Instance mapping process
• Valid Instance-to-Instance property assignment
  process
• User groups
• Groups for submission, verification,
  administration, etc.
• Roles of each group

11
Metamodels for Data Management

• Data to be Managed (i.e., required metamodels)
• Generating (Instantiating) Instances
• Concept-to-Instance relations
• Mapping information between Concepts and
  Instances, ltConcept, Instancegt Pairs
• Concepts at the concept level (MDR) Instances at
  the instance level (Proposal)
• Instance-to-Instance relations
• Relation information (properties) between
  instances
• Reuse properties at the concept level for
  instance-to-instance links

author
Person
Book
Concept Level
Instance Level
12
Metamodel for Data Management (cont.)

• Metamodel for Management of Information
• concept-to-individual relations, individuals,
  individual-to-individual relations

Concept
Concept_Property
link
end

2..
abstraction
reused
1
1
Concept_Instance_Link
CP_IP_Link
concept_id1..1 Concept Instance_id1..n
Instance
CP_id1..1 Concept_Property IP_id1..1
Instance_Property
reuse
instantiation


Instance_Property
Instance

• CP Concept_Property
• IP Instance_Property

link
end

2..
13
Metamodel for Data Management (cont.)

• Considering the Relations Region

Link_End
Relation_Role
link_end_role1..1Relation_Role
link
end
Link
Concept
Relation

2..

reused
abstraction
1
1
Concept_Instance_Link
CP_IP_Link
concept_id1..1 Concept Instance_id1..n
Instance
CP_id1..1 Concept_Property IP_id1..1
Instance_Property
instantiation
reuse


Instance_Property
Instance
link
end

2..
14
Metamodel for Data Management (cont.)

• Considering the Relations Region
• Link_End and Instance_Link_End

link
end
Link
Concept
Relation

2..
Link_End
Relation_Role
link_end_role1..1Relation_Role
reused
abstraction
1
1
Necessary or Not
Concept_Instance_Link
CP_IP_Link
concept_id1..1 Concept Instance_id1..n
Instance
CP_id1..1 Concept_Property IP_id1..1
Instance_Property
Instance_Link_End
link_end_role1..1Relation_Role
instantiation
reuse


Instance_Property
Instance
link
end

2..
15
Ontology Registration Process
repetition
Statement Registration (Register a Statement,
ltInstance, Property, Instancegt)
Valid Property Assignment (Select Valid
Properties for two Instances)
Concept-to-Instance relations
Instance to Concept Mapping (Map an Instance to a
Concept)
Concept-to-Instance relations
Instance Generation (Instance Set)
Instance list
16
Conclusion and Next Step

• Summary of the Current Development Status
• Defined a metamodel for the instance management
• Defined the registration processes
• Further Work for the Next Plenary Meeting
• Definition of more metamodels
• for support of multiple ontologies
• for management of additional information, if
  needed
• Definition of user groups and their roles
• Providing various and concrete examples
• Defining data models for practical use
• RDB-based model and/or OODB-based model
• might be provided as an appendix
• And ......

17
Q/A
Thank you! Dongwon Jeong (djeong_at_kunsan.ac.kr),
Kunsan National University Doo-Kwon Baik
(baikdk_at_korea.ac.kr), Korea University