OntoGrid Semantic Grid Tutorial Manchester, February 2007 Semantic Grid. Future Work Oscar Corcho...

OntoGrid Semantic Grid TutorialManchester, February 2007

Semantic Grid.Future Work

www.ontogrid.eu

Oscar CorchoUniversity of Manchester

2Oscar Corcho. OntoGrid Semantic Grid tutorial. February 2007

Contents

Our agenda in OntoGridS-OGSA and the Semantic Binding ServiceWS-DAIOntPrototypes

Usage guidelines Service-Oriented Knowledge Utilities


Semantic Binding Service. WS-SBResourceLifetime

SB Housekeeping serviceStable

Stale

GEchanged

KEchanged

Archived Deleted

Semantic Binding Service

WS-Notif.[state]

WS-Notif[lastModificationTime]

Client

Grid Entity

Knowledge Entity

Client Client

Query-RP [state]

subscribe subscribe

subscribe


Semantic Binding Service. Container in a browser

http://localhost:8080/wsrf/services/SemanticBindingService/1234567/content

SB1SB2SB3SB4...


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 ...


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


WS-DAIOnt: Current status

Motivational document created: “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


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


WS-DAIOnt: Informational document outline

1. Introduction2. Background

2.1. Ongoing Research and Development Projects2.1.1. Ontology Access in Grids2.1.2. Semantic Service Oriented Architecture: AIST-SOA

2.2. GGF Database Access and Integration Services Working Group2.3. W3C RDF Data Access Working Group2.4. RDF Storage (Database) Systems

3. Motivational Scenarios3.1. Ontology-based Access to RDF(S) Data Resources3.2. Query-based Access to RDF(S) Data Resources

4. Roadmap4.1. Specification Organization4.2. Scope and Goals4.3. Schedule

5. Conclusions


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)


WS-DAIOnt: Where to look for further information

DAIS WG GridForge site: https://forge.gridforum.org/sf/projects/dais-wg

DAIS WG mailing list: [email protected]

DAIS-RDF(S) internal mailing list: [email protected]

OntoGrid Contact person: Miguel Esteban Gutiérrez ([email protected])


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 …

19Footer INFO .......

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

· RDQL Query · Semantic Bindings

OGSA-DAI Core Extended Aditional functionality

· RDQL Query Client· Semantic Bindings

Client

WSI Client Extended

- OntoGrid Insurance Use Case


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


Contents


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


Contents


Usage guidelines Service-Oriented Knowledge Utilities

Next Generation Grids Reports

NGG1 – 2003

European Grid

Research2005 – 2010

NGG2 – 2004

Requirementsand Options

for European Grids Research

2005-2010 and Beyond

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

http://www.cordis.lu/ist/grids

Source: David de Roure

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


NGG3

NGG1&NGG2 vision and research challenges

Research Challenges

NextGeneration

Grids

Architectural Vision

OpenReliable Scalable

Persistent Transparent

Person-centricPervasive

Secure / trusted Standards-based

User Interface

Grid Economies Business models

Virtual Organisation

Systems Management Co-ord. and orchestration

Information representation

Research Themes

NextGeneration

Grid(s)

Future for European Grids: GRIDs and Service Oriented Knowledge Utilities –Future for European Grids: GRIDs and Service Oriented Knowledge Utilities – Vision and Research Directions 2010 and Beyond, December 2006Vision and Research Directions 2010 and Beyond, December 2006

End-User – Business/Enterprise –Manufacturing/Industrial

Research Topics

Driving Scenarios

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Semantic Technologies

Mechanisation of composition Scalable reasoning and formalisation Heterogeneous and dynamic

semantic descriptions Lifecycle of knowledge Collaboration and sharing S

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NGG3

ResearchTopic 6



Lifecycle Management

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

Lif

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NGG3

ResearchTopic 1



Lif

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M

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Trust and Security in VOs

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

Tru

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S

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NGG3

ResearchTopic 2



Lif

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Adaptability, Scalability, Dependability

Self-* systemsself-managing, self-optimising, self-

configuring, self-healing, self-protecting, self-organising

autonomic systems Peer-to-peer Scalability

Ad

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NGG3

ResearchTopic 3



Lif

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Raising the Level of Abstraction

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

Ra

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NGG3

ResearchTopic 4



Lif

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Pervasiveness and Context Awareness

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

Pe

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NGG3

ResearchTopic 5



Lif

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Human Factors and Societal Issues

User requirements and evaluation Intersection between the physical

world and the digital Personalisation techniques Issues of collaboration and

community Socio-economic aspects H

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Fa

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S

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NGG3

ResearchTopic 7


OntoGrid Semantic Grid TutorialManchester, February 2007

Semantic Grid.Future Work

www.ontogrid.eu

Oscar CorchoUniversity of Manchester

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