Transcript lyon-hey

Shaping the e-future?
Grids, Web Services and Digital Libraries
Professor Tony Hey, Director UK e-Science Programme
Dr Liz Lyon, Director UKOLN
International JISC/CNI Conference
June 2002, Edinburgh, UK
A centre of expertise in digital information management
www.ukoln.ac.uk
Part 2 Joining up the thinking
• Web Services & the Information Environment
• Unpacking the components
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Infrastructure services : registries
Semantics and knowledge technologies
Re-applying Grid concepts
Service management : autonomic computing, e-Utilities
• A new, broader, integrated vision?
A centre of expertise in digital information management
www.ukoln.ac.uk
The JISC Information Environment
• “build an on-line information environment
providing secure and convenient access to a
comprehensive collection of scholarly and
educational material”
JISC Strategy 2001-2005
• Technical Architecture Study May 2001
http://www.ukoln.ac.uk/distributed-systems/dner/arch/dner-arch.html
– Content providers, shared services, brokers &
aggregators, portals
– Discover: searching (Z39.50), sharing (OAI-PMH),
alerting (RSS)
– Access: resolver (OpenURL), institutional profiles
A centre of expertise in digital information management
www.ukoln.ac.uk
Web Services
• Business models
– Application to application, B2C to B2B, m2m
• Global take-up
– Google Web Services APIs
– Campus services integration at UC Berkeley
– UK e-Government Interoperability Framework
(e-GIF) Vs 4.0
• Support organisations
– World Wide Web Consortium (W3C) Web
Services Activity http://www.w3.org/2002/ws/
– Web Services Interoperability Working Group
(WS-I) http://www.ws-i.org/
A centre of expertise in digital information management
www.ukoln.ac.uk
Web Services standards
• WSDL Web Services Description Language
http://www.w3.org/TR/wsdl
– descriptions of Web Services
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UDDI Universal Discovery, Description & Integration
http://www.uddi.org/specification.html
– registries containing service descriptions
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SOAP Simple Object Access Protocol
http://www.w3.org/TR/SOAP/
– transport protocol for communication between Web Services
• Emerging standards: WSRP, WSIA, WSXL…….
A centre of expertise in digital information management
www.ukoln.ac.uk
IBM Web Services model
Service
provider
WSDL
WSDL
UDDI
SOAP
Service
Service
registry
requestor
Find
WSDL UDDI
A centre of expertise in digital information management
www.ukoln.ac.uk
JISC IE Web Services mapping
Service
Content providers,
aggregators,
brokers, shared
services
provider
Collection
description
service and
Service
description
service
IE service
registry?
Service
registry
Service
Find
A centre of expertise in digital information management
www.ukoln.ac.uk
requestor
Portals,
aggregators,
brokers
The JISC Information Environment and Web
Services
Andy Powell and Liz Lyon
http://www.ariadne.ac.uk/issue31/informationenvironments/
Service
Content providers,
aggregators,
brokers, shared
services
provider
Collection
description
service and
Service
description
service
IE service
registry?
Service
registry
Service
Find
A centre of expertise in digital information management
www.ukoln.ac.uk
requestor
Portals,
aggregators,
brokers
Service Registries
• UDDI Web Service standard
– Global public registry
– Private registries
• JISC Information Environment registry
• Grid Service registry
– Service type
– Service instance
• Functionality
– Registries are dynamic services
– Implement searching across multiple registries
• New Web Services compliant products ?
A centre of expertise in digital information management
www.ukoln.ac.uk
Metadata Schema Registries
• CORES http://www.cores-eu.net/
a forum on shared metadata vocabularies.
– Standards Interoperability Forum in November
– A Metadata Registry for the Semantic Web
Rachel Heery (UKOLN) & Harry Wagner (OCLC) D-Lib May 2002
• Metadata for Education Group (MEG)
http://www.ukoln.ac.uk/metadata/education/regproj/
– Demo of registry at Workshop in September
• 2nd Joint UKOLN / NeSC workshop Autumn 2002
– focussing on exchange of practical experience
A centre of expertise in digital information management
www.ukoln.ac.uk
Semantic Web architecture – Tim Berners-Lee
http://www.w3.org/2000/Talks/1206-xml2k-tbl/slide10-0.html
A centre of expertise in digital information management
www.ukoln.ac.uk
Ontologies and semantics
• Semantic Web vision : a shared understanding of the
meaning of descriptions of digital content (human, m2m)
• An ontology defines the terms used to describe and
represent an area of knowledge
– classes of “things”
– relationships between things
– properties (attributes) of things
• Semantic Web and Web Services are complementary
– WWW and Web Services based on XML
– Semantic Web based on ontology languages e.g. RDF, DAML+OIL
• New Web ontology languages under development
DAML-Services, Ontology Web Language (OWL)
– http://www.w3.org/2001/sw/WebOnt/
A centre of expertise in digital information management
www.ukoln.ac.uk
e.g.
A centre of expertise in digital information management
www.ukoln.ac.uk
Knowledge and Web mining
• The application of data mining techniques to
the content, structure and usage of Web
resources
• Usage mining e.g. Amazon personal
recommendations (note privacy issues!)
• Structure mining e.g. RDN-WSE project
http://ilrt.org/discovery/2002/01/wse-rdn/
• Content mining (data) e.g. AstroGrid
developing a virtual observatory to support
exploitation of key astronomical datasets
http://www.astrogrid.org/
A centre of expertise in digital information management
www.ukoln.ac.uk
Grid Services
• Persistent services e.g. a data repository
• Transient service instances which are
dynamically created through a Factory interface
and have a specified lifetime
e.g. a distributed data mining service
• How can we apply Web mining techniques to DL
resources ?
– Pattern analysis of multiple distributed video streams
– Textual analysis of virtual collections of archival
documents
A centre of expertise in digital information management
www.ukoln.ac.uk
Collaborative environments
• Distributed scientific collaboration
• Collaborative Advanced Knowledge
Technologies in the Grid (CoAKTinG)
http://www.aiai.ed.ac.uk/project/akt/coakting/
– Smart spaces
– Ontologically annotated audio/video streams
– Describing “presence”
• How can we apply research experience to
Learning & Teaching environments ?
– Tutor/student/group interaction in a VLE
A centre of expertise in digital information management
www.ukoln.ac.uk
Computing (e-)Utilities
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Computing on-demand
Storage on-demand
Applications on-demand
Application Service Providers (ASPs)
• Which digital library functions should we
outsource to improve efficiency ?
– Preservation and curation services
– Resolver services
– Data / learning resource repositories
A centre of expertise in digital information management
www.ukoln.ac.uk
Autonomic computing
• “Technology needs to manage itself”
Irving Wladawsky-Berger, IBM
• Manifesto
Paul Horn, IBM
http://www.research.ibm.com/autonomic/manifesto/autonomic_computing.pdf
• 8 key elements e.g.
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Self-optimising
Self-configuration
Self-healing
Self-protecting
• Should we apply this approach to digital libraries?
– Improve performance by “intelligent” selection of targets
for search requests based on response times
A centre of expertise in digital information management
www.ukoln.ac.uk
The e-future?
Digital Libraries
Persistent
Data
Information
Semantic
Web
Knowledge
Grids
Transient
Business
A centre of expertise in digital information management
www.ukoln.ac.uk
Web Services
Transactional
……Questions?
A centre of expertise in digital information management
www.ukoln.ac.uk