Grid Virtual Organization Semantic Framework for Knowledge Support Bartosz Kryza, Łukasz Dutka, Renata Słota, Jan Pieczykolan, Jacek Kitowski

2 Agenda MotivationMotivation ApproachApproach Advancements in SoAAdvancements in SoA Use CasesUse Cases ArchitectureArchitecture IssuesIssues

3 Motivation Hide complexity of classical GridsHide complexity of classical Grids –Business and Science use different language Lack of support for VO of business (enterprise) entitiesLack of support for VO of business (enterprise) entities Lack of support for dynamic VOLack of support for dynamic VO

4 Assumptions Use of simple formalisms for defining models of cooperation between partners in VOUse of simple formalisms for defining models of cooperation between partners in VO Declarative requirements of VOs (e.g. VO1 must be able to share photographic high-res photos – requires business rules support)Declarative requirements of VOs (e.g. VO1 must be able to share photographic high-res photos – requires business rules support) Support for business activities and experience (share photos means at least 1TB storage)Support for business activities and experience (share photos means at least 1TB storage)

5 Approach Ontological services supporting interoperability between partners in a VO and across VOsOntological services supporting interoperability between partners in a VO and across VOs Ontology/knowledge evolutionOntology/knowledge evolution Semantic abstraction layer over available resources in the GridSemantic abstraction layer over available resources in the Grid

6 Advancement in State of the Art Virtual Organization models Definition of models for business oriented Virtual Organizations. Ontologies in management of Virtual Organizations Definition of ontologies for business oriented VOs based on reusability paradigm. Development of ontology evolution methods for improvement of querying and extension of knowledge. Metadata management in Grids: LDAP, R-GMA, MDS Provide a semantic abstraction layer over existing metadata services.

7 GVOSF Use Cases Manage Virtual OrganizationManage Virtual Organization Store and publish domain specific knowledgeStore and publish domain specific knowledge Modify domain specific knowledgeModify domain specific knowledge Manage usersManage users Support complex activitiesSupport complex activities

8 Manage VO CreateCreate –Declare new static VO –Define a dynamic VO EvolveEvolve –Update the definition of a VO (automatic or manual) DissolveDissolve –Remove definition of a VO and references to resources

9 Store and publish domain KW Publish domain specific ontologiesPublish domain specific ontologies Answer semantic queriesAnswer semantic queries Provide reasoning capabilitiesProvide reasoning capabilities Provide access to other ‘registries’ through semantic queriesProvide access to other ‘registries’ through semantic queries

10 GVOSF Architecture The generic GOM infrastructure, developed in K-Wf Grid, will be extended by a set of specific interfacesThe generic GOM infrastructure, developed in K-Wf Grid, will be extended by a set of specific interfaces These interfaces will ease the integration of GOM with other system components as well as with end-usersThese interfaces will ease the integration of GOM with other system components as well as with end-users

11 GVOSF Architecture

12 GVOSF Architecture: Ontologies Provide generic models of Virtual Organizations, abstract activitiesProvide generic models of Virtual Organizations, abstract activities Allow to define Virtual Organizations in terms of participants and requirementsAllow to define Virtual Organizations in terms of participants and requirements Contain abstract concepts for definition of resources within the Virtual OrganizationContain abstract concepts for definition of resources within the Virtual Organization

13 GVOSF Architecture: GOM Manage the ontologies within the Virtual OrganizationsManage the ontologies within the Virtual Organizations Provide means for generic Description Logic reasoningProvide means for generic Description Logic reasoning Answer queriesAnswer queries Support evolution of knowledgeSupport evolution of knowledge

14 GVOSF Architecture: Components Ontology similarityOntology similarity –This interface provides means for querying and updating knowledge in GOM using several ontology similarity algorithms End-user GUIEnd-user GUI –This interface, based on a Protege environment, will enable users to manipulate the ontologies from a GUI based applications

15 GVOSF Architecture: Components VO ManagementVO Management –This interface will provide specific operations related strictly to VO management such as registerUser or assignRole. Free textFree text –This interface will enable modification and querying of knowlegde base using free text input (e.g. possible integration with RDLS)

16 GVOSF Issues SecuritySecurity –Business will have high security requirements -> GVOSF should also adress this issue WorkflowsWorkflows –What will the workflow in VO mean? VO definitionVO definition –How VO will be defined for particular purpose (e.g. based on contract)? ACLACL –Translation of ontological VO contract into ACLs

Thank You! Questions ?