Post on 16-Apr-2017
SEMANTIC WEB SERVICES
META-MODEL
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AgendaClassical Web Services
The Vision
Semantic Web Service Interaction
Some Existing Standards
New Approach
Meta-model Definition & Building
Example
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“Classical” Web Services
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The Vision
Static
◦ 500 million users ◦ more than 3 billion pages
WWWURI, HTML, HTTP
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The Vision
WWWURI, HTML, HTTP
Serious Problems in ◦ information finding,◦ information extracting,◦ information representing,◦ information interpreting and◦ and information maintaining.
Semantic WebRDF, RDF(S), OWL
Static
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The Vision
WWWURI, HTML, HTTP
Bringing the computer back as a device for computation
Semantic WebRDF, RDF(S), OWL
Dynamic Web ServicesUDDI, WSDL, SOAP
Static
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The Vision
WWWURI, HTML, HTTP
Bringing the web to its full potential(machine-understandable functionality)
Semantic WebRDF, RDF(S), OWL
Dynamic Web ServicesUDDI, WSDL, SOAP
Static
Semantic WebServices
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Semantic Web Service Interaction
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Semantic Web Service Interaction
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Semantic Web Service Interaction
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Semantic Web Service Interaction
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Semantic Web Service Interaction
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Semantic Web Service Interaction
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Semantic Web Service Interaction
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Semantic Web Service Interaction
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Alternative Interaction
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Alternative Interaction
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Alternative Interaction
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Alternative Interaction
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Alternative Interaction
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Alternative Interaction
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Some Existing StandardsOWL-S
WSMO
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OWL-SSemantic markup for web services
Enables discovery of services that:
o Meet particular requirements
o Adhere to specified constraints
Invocation by:
o Agents
o Other services
Automated service composition
o Provide new services
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OWL-SSWS in OWL-S consists of:
o Service profile
o Description of what the system does
o Used to advertise the service
o Service model
o How it works internally
o Service grounding
o How to access and interact with it
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OWL-S: Service Model
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OWL-S: Service Profile
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OWL-S: Service Grounding
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Web Service Modeling Ontology (WSMO)Formal ontology & language
Consists of 4 main elements:o Ontologieso Goalso Web serviceso Mediators
Comes with a modeling language called WSML
Most of the elements in WSMO can be described with non-functional
properties
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WSMO Top-Level Elements
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WSMO: Ontology
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WSMO: Web Service
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WSMO: Goals
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New Approach: SWS Meta-Model
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SWS Meta-Model for Ontology
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SWS Meta-Model for Interfaces, Operations & Messages
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SWS Meta-Model for Service Provider
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SWS Meta-Model for the Process Model
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Example: CongoBuyBookbuying company
o www.congo.com
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CongoBuy Interfaces
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Service Provider with Processes
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Thank you!Hussein AlShkhir