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OntoGrid Semantic Grid Tutorial Manchester, February 2007

Semantic Grid. Future Work. www.ontogrid.eu. Oscar Corcho University of Manchester. OntoGrid Semantic Grid Tutorial Manchester, February 2007. Contents. Our agenda in OntoGrid S-OGSA and the Semantic Binding Service WS-DAIOnt Prototypes Usage guidelines

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OntoGrid Semantic Grid Tutorial Manchester, February 2007

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  1. Semantic Grid.Future Work www.ontogrid.eu Oscar Corcho University of Manchester OntoGrid Semantic Grid Tutorial Manchester, February 2007

  2. Contents • Our agenda in OntoGrid • S-OGSA and the Semantic Binding Service • WS-DAIOnt • Prototypes • Usage guidelines • Service-Oriented Knowledge Utilities Oscar Corcho. OntoGrid Semantic Grid tutorial. February 2007

  3. Semantic Binding Service. WS-SBResourceLifetime Stable Client Client Client WS-Notif. [state] subscribe Query-RP [state] Stale GE changed KE changed Semantic Binding Service subscribe subscribe WS-Notif [lastModificationTime] Archived Deleted Knowledge Entity Grid Entity • SB Housekeeping service Oscar Corcho. OntoGrid Semantic Grid tutorial. February 2007

  4. Semantic Binding Service. Container in a browser http://localhost:8080/wsrf/services/SemanticBindingService/1234567/content SB1 SB2 SB3 SB4 ... Oscar Corcho. OntoGrid Semantic Grid tutorial. February 2007

  5. WS-DAIOnt: What’s missing in the puzzle? • 2+4 ontology inter-ontology relationships coverage • Self-contained vs Cross-contained schemas • Isolated instantiations vs Aggregated instantiations • Naming vs Addressing solution for providing inter-ontology relationships • How do we refer to an specific element of an ontology inside the grid? • How do we access to an specific element of an ontology inside the grid given its name? • Low level management stuff • Ontology access service’s life cycle management • Trust & Security issues: • Who may use an specific ontology access service? • Who may read/write the specific elements of an ontology? • Quality & Reliability issues: • Who controls/evaluates the validity of the ontologies served by ontology access services? • If ontology access services are federated, what happens when any is unavailable? • Distributed ontology support • Replica management • ... Oscar Corcho. OntoGrid Semantic Grid tutorial. February 2007

  6. WS-DAIOnt: Standardisation roadmap • 2006.02: GGF16 at Athens • DAIS for RDF BOF: Share the Motivation • 2006.05: GGF17 DAIS-WG at Tokyo • Charter Discussion • Focus on RDF and RDF Schema (RDF(S)) • Scope/Roadmap/Deliverables • 2006.06: RDF F2F at Edinburgh • Decide to make an informational document • Motivational Document : Structure Discussion • 2006.09: OGF18 at Washington • Informational document presented • Draft specifications presented • 2007.01: OGF19 at Chapel Hill • Specification strawmans presented Oscar Corcho. OntoGrid Semantic Grid tutorial. February 2007

  7. WS-DAIOnt: Current status • Motivational documentcreated: • “DAIS RDF(S) Realization: Background and Motivational Scenarios” • 1st version is completed, already available in GridForge (https://forge.gridforum.org/sf/go/doc13710?nav=1) • Ontology access and Query access strawman specification available: • RDF Querying: https://forge.gridforum.org/sf/go/doc14074?nav=1 • RDF(S) Ontology: https://forge.gridforum.org/sf/go/doc14083?nav=1 Oscar Corcho. OntoGrid Semantic Grid tutorial. February 2007

  8. WS-DAIOnt: The informational document • DAIS RDF(S) Realization: Background and Motivational Scenarios • Aim of the document: • To define the scope of this activity • To appeal to wider audience Oscar Corcho. OntoGrid Semantic Grid tutorial. February 2007

  9. WS-DAIOnt: Informational document outline • Introduction 2. Background 2.1. Ongoing Research and Development Projects 2.1.1. Ontology Access in Grids 2.1.2. Semantic Service Oriented Architecture: AIST-SOA 2.2. GGF Database Access and Integration Services Working Group 2.3. W3C RDF Data Access Working Group 2.4. RDF Storage (Database) Systems 3. Motivational Scenarios 3.1. Ontology-based Access to RDF(S) Data Resources 3.2. Query-based Access to RDF(S) Data Resources 4. Roadmap 4.1. Specification Organization 4.2. Scope and Goals 4.3. Schedule 5. Conclusions Oscar Corcho. OntoGrid Semantic Grid tutorial. February 2007

  10. WS-DAIOnt: Future work (within OGF DAIS WG) • Polish strawmans • Create a common glossary of terms • Sanity check with W3C people • Develop at least two reference implementations of the specifications (required for standardization) Oscar Corcho. OntoGrid Semantic Grid tutorial. February 2007

  11. WS-DAIOnt: Where to look for further information • DAIS WG GridForge site: • https://forge.gridforum.org/sf/projects/dais-wg • DAIS WG mailing list: • dais-wg@ogf.org • DAIS-RDF(S) internal mailing list: • dais-rdfs@delicias.dia.fi.upm.es • OntoGrid Contact person: • Miguel Esteban Gutiérrez (mesteban@fi.upm.es) Oscar Corcho. OntoGrid Semantic Grid tutorial. February 2007

  12. Beyond WS-DAIOnt-RDF(S) • Aggregation of RDF(S) repositories • OWL support • General ontology access mechanism • Integration of interesting ontological engineering functionalities: • Ontology evolution • Ontology alignment • … Oscar Corcho. OntoGrid Semantic Grid tutorial. February 2007

  13. Prototypes. S-OGSA-DAI • Comply with existing architecture • Minimally intrusive to OGSA-DAI code • Find Extensibility points of source code • OGSA-DAI provides supports for extensibility Footer INFO .......

  14. Prototypes. EGEE Information Integration Service • Information integration from gLite and GT4 information services • BDII • RGMA • MDS • Trade-off between... • Continuous update or on-demand access, fresh information • Consolidated data but possibly non-fresh information Oscar Corcho. OntoGrid Semantic Grid tutorial. February 2007

  15. Contents • Our agenda in OntoGrid • S-OGSA and the Semantic Binding Service • WS-DAIOnt • Prototypes • Usage guidelines Understanding Semantic-Aware Grid Middleware for e-Science. Alper P, Corcho O, Goble CA. Journal of Computing and Informatics. Special issue on Semantic e-Science. To appear in 2007. • Service-Oriented Knowledge Utilities Oscar Corcho. OntoGrid Semantic Grid tutorial. February 2007

  16. Contents • Our agenda in OntoGrid • S-OGSA and the Semantic Binding Service • WS-DAIOnt • Prototypes • Usage guidelines • Service-Oriented Knowledge Utilities Oscar Corcho. OntoGrid Semantic Grid tutorial. February 2007

  17. Next Generation Grids Reports NGG3 – 2005 Future for European Grids: GRIDs and Service Oriented Knowledge Utilities Vision and Research Directions 2010 and Beyond Main source of inspiration for FP6 Grid Research and beyond NGG2 – 2004 Requirementsand Optionsfor European Grids Research 2005-2010 and Beyond NGG1 – 2003 European Grid Research2005 – 2010 http://www.cordis.lu/ist/grids Source: David de Roure

  18. Service Oriented Knowledge Utilities • Next Generation Grids Expert Group Report 3 (NGG3) published January 2006 • Converged vision of Next Generation Grids and Service Oriented Knowledge Utilities • Service Oriented–services may be instantiated and assembled dynamically • Knowledge –knowledge-assisted to facilitate automation, and processing and delivering knowledge • Utility–directly and immediately useable service with established functionality, performance and dependability Ecosystem of Dependable, Knowledge-aware, Societal, Autonomic, Stateful services

  19. Research Challenges NGG3 Future for European Grids: GRIDs and Service Oriented Knowledge Utilities – Vision and Research Directions 2010 and Beyond, December 2006 End-User – Business/Enterprise –Manufacturing/Industrial Driving Scenarios Service-Oriented Knowledge Utility Human Factors and Societal Issues Pervasiveness Context Awareness Research Topics Adaptability Scalability Dependability Semantic Technologies Trust and Security in VOs Lifecycle Management Raising the Level of Abstraction NGG1&NGG2 vision and research challenges Oscar Corcho. OntoGrid Semantic Grid tutorial. February 2007

  20. Semantic Technologies NGG3 • Mechanisation of composition • Scalable reasoning and formalisation • Heterogeneous and dynamic semantic descriptions • Lifecycle of knowledge • Collaboration and sharing Trust and Security in VOs Lifecycle Management Adaptability Scalability Dependability Pervasiveness Context Awareness Raising the Level of Abstraction Semantic Technologies Research Topic 6 Oscar Corcho. OntoGrid Semantic Grid tutorial. February 2007 Source: David de Roure

  21. Lifecycle Management NGG3 • On-the-fly service creation and deployment • Robust, efficient and semantically aware discovery of services • Composition of services • Management of functional and non-functional properties and requirements • Support for multiple “economy models” for the grid Lifecycle Management Research Topic 1 Oscar Corcho. OntoGrid Semantic Grid tutorial. February 2007 Source: David de Roure

  22. Trust and Security in VOs NGG3 • Ad hoc and managed virtual organisations of digital and physical entities • Policy and business practice • Service-level agreements • Authentication and authorisation in a multi-domain environment in which entities have multiple identities and multiple roles Trust and Security in VOs Lifecycle Management Research Topic 2 Oscar Corcho. OntoGrid Semantic Grid tutorial. February 2007 Source: David de Roure

  23. Adaptability, Scalability, Dependability NGG3 • Self-* systems • self-managing, self-optimising, self-configuring, self-healing, self-protecting, self-organising • autonomic systems • Peer-to-peer • Scalability Trust and Security in VOs Lifecycle Management Adaptability Scalability Dependability Research Topic 3 Oscar Corcho. OntoGrid Semantic Grid tutorial. February 2007 Source: David de Roure

  24. Raising the Level of Abstraction NGG3 • Higher level programming models and tools • New or improved management abstractions • Better operating systems capable of managing more complex resources and requirements from application, service and system contexts • Abstract/virtual service containers • Compact data formats Trust and Security in VOs Lifecycle Management Adaptability Scalability Dependability Raising the Level of Abstraction Research Topic 4 Oscar Corcho. OntoGrid Semantic Grid tutorial. February 2007 Source: David de Roure

  25. Pervasiveness and Context Awareness NGG3 • High-level interoperability, smooth composition and automatic self-organisation of software with structure and behaviour changing at run-time • Non-functional requirements related to interoperability, heterogeneity, mobility, and adaptability Trust and Security in VOs Lifecycle Management Adaptability Scalability Dependability Pervasiveness Context Awareness Raising the Level of Abstraction Research Topic 5 Oscar Corcho. OntoGrid Semantic Grid tutorial. February 2007 Source: David de Roure

  26. Human Factors and Societal Issues NGG3 • User requirements and evaluation • Intersection between the physical world and the digital • Personalisation techniques • Issues of collaboration and community • Socio-economic aspects Trust and Security in VOs Lifecycle Management Adaptability Scalability Dependability Pervasiveness Context Awareness Raising the Level of Abstraction Human Factors and Societal Issues Semantic Technologies Research Topic 7 Oscar Corcho. OntoGrid Semantic Grid tutorial. February 2007 Source: David de Roure

  27. Semantic Grid.Future Work www.ontogrid.eu Oscar Corcho University of Manchester OntoGrid Semantic Grid Tutorial Manchester, February 2007

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