Design and Development of a Core Grid Ontology

1
Design and Development of a Core Grid Ontology

• Wei Xing1, Marios D. Dikaiakos1, Rizos
  Sakellariou2,
• 1Department of Computer Science, University of
  Cyprus
• 2School of Computer Science, University of
  Manchester

2
Outline

• Introduction
• Problem Statement
• Building a Grid Model
• The Design of a Core Grid Ontology
• Implementation
• Conclusions and Future work.

3
Introduction

• Ontologies are among the key building blocks of
  the Semantic Grid.
• The concepts/terms of Grid entities, resources,
  capabilities and the relationships between them.
• Use Grid ontologies to
• Merge the information from different sources
• Build a knowledge base for Grids
• Deploy user-space information system
• Co-operate with semantic-able Grid services, such
  as Resource Broker, Information Service, etc.

4
Problem Statement

• There is currently a multitude of proposed Grid
  architectures and Grid implementations.
• Different views or interests of a Grid entity and
  its properties.
• It is practically impossible that one ontology
  can include all aspects of Grids, or thousands
  of Grid entities.

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Proposed Solution

• A Core Grid Ontology (CGO)
• A core framework for representing a Grid.
• Open and extensible for all kinds of Grid
  architectures and Grid implementations.

6
Building a Grid Model

• The most difficult task for developing an
  ontology
• Capture a right model for the Grid
• Our view of a Grid.
• Grid UsersApplicationsMiddleware/ServicesRe
  sources within VOs
• The proposed layer-structured model.
• Three layers Users/Applications,
  Middleware/services, and Resources.

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A Grid Model
8
CGO Classes Overview
9
Defining properties
Based on the Constraints of the CGO Classes.
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Representing Grid Entity
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Representing Grid Entity using OWL
ltowlClass rdfID"ComputingElement"gt
ltrdfssubClassOfgt ltowlRestrictiongt
ltowlsomeValuesFromgt
ltowlClassgt
ltowlunionOf rdfparseType"Collection"gt
ltowlClass rdfabout"Jobmanager"/
gt ltowlClass
rdfabout"JobScheduler"/gt
lt/owlunionOfgt lt/owlClassgt
lt/owlsomeValuesFromgt
ltowlonProperty rdfresource"runningSevice"/gt
lt/owlRestrictiongt
lt/rdfssubClassOfgt
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Generating Instances
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Implementation
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Conclusions and Future Work

• The CGO can be a key representation tool for the
  Semantic Grid.
• The CGO is able to express the basic concepts and
  relationships of Grid entities and Grid
  resources.
• The flexibility and extensibility of the ontology
  allows it to be used for Grid information
  integration, information searching.
• Next step
• Building a Grid knowledge base.

15

• Thank you for your attention!
• Questions?
• Comments ?