FP6-511513

OntoGrid: Paving the way for Knowledgeable

Grid Services and Systems

www.ontogrid.net

February 2006

Semantic-OGSA: A Semantic Grid Reference Architecture

Carole Goble, Pinar Alper, Oscar CorchoThe University of Manchester

4S-OGSA

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

5S-OGSA

Exposed Explicit Semantic Descriptionsare Manageable Resources

Knowledge is a Commodity. Semantic Infrastructure to go with the Grid

Infrastructure. It has a representation, a state, a life cycle and a

life time, an access policy, an owner, it changes, it can be integrate and aggregation.

It gets produced and consumed. It gets used and stored and destroyed.

A Semantic Data Grid

8S-OGSA

Applications

Security DatabaseWorkflow File Sys Directory

Web Services

OGSA Enabled OGSA Enabled OGSA Enabled OGSA EnabledOGSA Enabled

Servers Storage Network

OGSA Enabled OGSA Enabled OGSA Enabled

OGSA Infrastructure SemanticProvisioning

services

SemanticProvisioning

services

Grid Service

Grid Service

Grid Service

OGSA Architected Services

Grid AppGrid App

App

From OGSA to Semantic-OGSA

9S-OGSA

Applications

Security DatabaseWorkflow File Sys Directory

Web Services

OGSA Enabled OGSA Enabled OGSA Enabled OGSA EnabledOGSA Enabled

Servers Storage Network

OGSA Enabled OGSA Enabled OGSA Enabled

OGSA Infrastructure

OGSA Architected Services

S-OGSA Infrastructure

SemanticProvisioning

services

Semantic provisioning

services

Semantic Aware GS

Semantic Aware GS

Semantic Aware GA

Grid Service

Grid App

App

From OGSA to Semantic-OGSA

10S-OGSA

Desiderata – a thing of elegance and beauty

Architecture as lightweight as possible: minimise the impact

Extensible and customisable as opposed to complete and generic architecture

Everything is OGSA compliant

Mixed ecosystem of Grid andSemantic Grid services

Straightforward migration pathAny resource can have multiple descriptions andany description can be in different formalisms

Conceptual: reference architecture that can be applied to any grounding (GT4, etc.)

11S-OGSA

S-OGSA

S-OGSA is...A Semantic Grid reference architecture

A low-impact extension of OGSA• Mixed ecosystem of Grid and Semantic Grid services

Defined by Information model

• New entities Capabilities

• New functionalities Mechanisms

• How it is delivered

Model

Capabilities Mechanisms

provide/consume

expose

use

12S-OGSA

Semantic Annotations

Reasoning

13S-OGSA

Semantic ProvisioningService

Knowledge Resource

Grid Entity

Semantic Binding

Grid ServiceIs-a

0..m0..m

1..m1..m

Semantic aware Grid Service

consume

produce

0..m0..m

1..m1..m

uses

VOMS

SAML

DFDL file

JSDL file

Is-a

Knowledge Entity

Is-a

Ontology Service

Is-a

Reasoning Service

Semantic BindingProvisioning Service

Annotation Service

Metadata Service

Grid Resource

IDT

AtlasIs-a Is-a

Is-a

Is-a

KnowledgeProvisioning

Service

Is-a

Ontology

Rule set

Knowledge Semantic Grid Grid

S-OGSA Model and Capabilities

Knowledge GridSemantic Grid

15S-OGSA

Optimization

Execution Management

Resourcemanagement

Data

Security

Information Management

Infrastructure Services

Application 1 Application N

delegates

extends

refers

composes

OG

SA

Sem

antic

-OG

SA

Semantic Services

delegates

Ontology

ReasoningKno

wle

dge

Metadata

Annotation

Sem

antic

bin

ding

Semantic Provisioning Services

From OGSA to the S-OGSA Service Oriented Architecture!!

17S-OGSA

Grid resource ontology

18S-OGSA

WS-DAIMessage Patterns

Behavioural Properties

WS-DAIOnt WS-DAIXXML

WS-DAIRRelational

WS-DAIO-RDFRDF Specific

WS-DAIO-OWLOWL specific

WS-RDF

Jena Sesame

Atlas

S-OGSA Model and Capabilities

20S-OGSA

S-OGSA MechanismsKnowledge and Metadata As Manageable Resources

21S-OGSA

S-OGSA Mechanisms: S-StatefulServices

Lifetime

Notification

State/properties metadata . . .

WSRF defined operations

• getProperties

• queryProperties

MetadataService

OntologyService

Service

Resource

MetadataSeekingClient

3

1

2

Semantic Binding IdsRetrieval Request

Semantic Binding Ids

Metadata Retrieval/Query Request

4 Query/Retrieval Result

5 Obtain schema for Semantic Bindings

22S-OGSA

OntoKit: Refactored and additional components

Coordinationand

negotiation

IntelligentDebugging

Coordinationand

negotiation

IntelligentDebugging

Semantically Aware

25S-OGSA

Semantic Grid Workshop Wednesday 13.30

S-OGSA as a Reference Architecture for OntoGrid and for the Semantic Grid Pinar Alper, Oscar Corcho, Ioannis Kotsiopoulos, Paolo Missier, Sean

Bechhofer, Dean Kuo, Carole Goble Improving a Satellite Mission System by means of a

Semantic Grid architecture Manuel Sánchez-Gestido, María S. Pérez-Hernández, Rafael González-Cabero, Asunción Gómez-Perez

Semantic Grid Resource Discovery using DHTs in Atlas

Manolis Koubarakis, Zoi Kaoudi, Iris Miliaraki, Matoula Magiridou, Antonios Papadakis-Pesaresi

WS-DAIOnt: Ontology Access Provisioning in Grid Environments Miguel Esteban Gutiérrez, Asunción Gómez-Pérez, Oscar Muoz García, Boris Villazón Terrazas

http://www.ontogrid.net

28S-OGSA

Questions

Malcolm Atkinson Constraints on the consistency of bindings over the

same Grid EntityPre- and Post- conditions on transformation

servicesParametric conditions on WSDL (WSMO)

Ian FosterSecurity attribute assertions are a kind of annotation

service