Semantic Service Discovery with Feta

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Semantic Service Discovery with Feta

• Pinar ALPER
• University of Manchester
• penpecip_at_cs.man.ac.uk

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Outline

• Problem Definition
• myGrid Domain Ontology
• Discovery Dimensions
• Demo Discovery
• How did it work - architecture
• Annotation Process
• Demo Pedro tool
• How did it work architecture
• Past Experiences
• Futures

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Problem

• How to select among 1000 services?
• Domain specific descriptions of capabilities
• A common abstraction Processor

?
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myGrid Ontology

• Captures the common abstraction
• Defines domain types for objects passed around
• Defines a set of dimensions with which service
  capabilities can be defined
• Two forms exist
• OWL
• RDF(S) similar to GO in terms of expressivity-
  used in Feta

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myGrid Ontology (Closer Look)
Specialises
Upper level ontology
Contributes to
Task ontology
Informatics ontology
Molecular Biology ontology
Publishing ontology
Organisation ontology
Bioinformatics ontology
sequence
protein_structure_feature
Web Service ontology
biological_sequence
Similarity Search Service
protein_sequence
BLAST service
nucleotide_sequence
DNA_sequence
BLASTp service
InterProScan service
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Questions we can ask

• Find me services that,
• Accepts input of domain type X or more general
• DNA_sequence would include biological_sequence
• E.g. BLAST service,
• Produces output of domain type Y or more specific
• Performs task T or more specific
• Alignment would include local_alignment
• E.g. BLAST, FASTA

• Dimensions for service capabilities

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Questions we can ask (contd.)

• Uses resource R or more specific
• Databases such as GENBANK, dbEST Database
• E.g Distinguish between BLAST over different DBs
• Uses method M or more specific
• Alignment will include Smith_Watermann algorithm
• Is part of Application A or more specific
• EMBOSS
• NCBI BLAST directly or BLAST through EMBOSS
• DEMO

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Feta Architecture (discovery focused)
Feta Descriptions
Feta Descriptions
Feta Descriptions
Obtain descriptions
Taverna Workbench
3
Obtain Classification
Feta GUI Client
Feta Engine Service
Ontology Editor
3
Semantic Discovery
4
Classification - In RDF(S) -
Build myGrid Domain Ontology
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Feta Architecture (discovery focused)
Feta Descriptions
Feta Descriptions
Feta Descriptions
?
Obtain descriptions
Taverna Workbench
3
Obtain Classification
Feta GUI Client
Feta Engine Service
Ontology Editor
3
Semantic Discovery
4
Classification - In RDF(S) -
Build myGrid Domain Ontology
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Generating/Publishing Feta Descriptions

• Import - Not starting from scratch
• Import supported for
• BioMoby
• WSDL
• Soaplab
• Scufl
• Annotate Bringing in ontology terms
• Partly populated description
• Ontology
• Publish description
• Publish to Web accessible locations
• Advertise their existence in service registries
  (optional)
• DEMO

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Feta Architecture (publication focused)
Scavenge Interface Descriptions
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Import
Feta Importer
WSDL- SCUFL-SOAPLAB
Publish service/workflow Interface description
Annotate
2
Pedro
3
Publish
3
Publish a pointer to the description
3
UDDI
Publish Description
2
Feta Descriptions
Access Classification
3
Notify service
Feta Engine Service
Classification - in RDF(S) -
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Past Experiences

• Highly expressive descriptions but costly
  solution.
• Using the ontology as a common vocabulary.
• Feta is in the middle for expressivity.

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Feta Futures

• GRIMOIRES
• UDDI and WSDL with metadata
• Ontology extension support
• Feedback is very valuable to us.
• Domain coverage of ontology
• Dimensions of search
• Modes of search
• Coverage of Feta Model

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Access to Feta

• Included in myGrid 0.6 beta 2 release
• http//sourceforge.net/projects/mygrid-uk
• cvs.mygrid.org.uk/
• Contact penpecip_at_cs.man.ac.uk
• Ideas and Overview in ESWC2005 paper