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Semantic Web based Collaborative Knowledge Management

Semantic Web based Collaborative Knowledge Management. A generic SOA for managing semantics driven domain knowledge. LSL, ECS Feng (Barry) Tao. Collaborative Knowledge Management. Process/Methodologies Identify conceptualization through ontology KA within the domain

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Semantic Web based Collaborative Knowledge Management

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  1. Semantic Web based Collaborative Knowledge Management A generic SOA for managing semantics driven domain knowledge LSL, ECS Feng (Barry) Tao

  2. Collaborative Knowledge Management • Process/Methodologies • Identify conceptualization through ontology • KA within the domain • Ontological engineering • semantically enrich data using ontology • Automatic annotation • Manual annotation wizard • manage knowledge through reusing semantically enriched data • Query RDF triples for knowledge • Inference and Reasoning • Architecture • Distributed (over more than one nodes) • Service Oriented • User orientation at different granularities (Web service, Portlet service, portal) • Ontology Driven • Technologies • Semantic Web • Web Service • J2EE, JSF and portlets • Domains • E-Science (Engineering design of optimization) • Learning (Learning through community knowledge management and sharing)

  3. Ontology Engineering

  4. Semantic web enriched data • Ontology • Explicit definitions • Concepts • Relations • Richer constraints in OWL • Cardinality • Semantic Annotation • Create instance representing entities in the application data • Fulfill definition/constraints through controlled annotation • Store as RDF triple statements

  5. RDF Triples of the Semantic Annotation object Subject predicate

  6. Technical Architecture • Portal (reusing portlets) • End users oriented • 3rd party applications • J2EE • JSF/Portlet • Web service proxy (reusing services) • Oriented to customizable GUI designers • Delivered as WAR files • Business Logic of the semantic management functions • Based on Jena RDF API • Tomcat Axis Web service • Interface described in WSDL • Oriented to service consumers

  7. Semantic Management Services • Tomcat Axis web service • Managing ontology • Semantically annotating resources • Semantic query of the annotated resource

  8. Sequence Diagram of using the semantic management services

  9. // semantic query // query the semantic annotations as triples (subject, predicate, object) SemanticQuery.querySubject(subjectURI, ontologyName) subjectURI = tom ontologyName = photo  results:  Example usages of the SMS another example is subjectURI = tom ontologyName = elegiProject    result is:  <sparql     xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"     xmlns:xs="http://www.w3.org/2001/XMLSchema#"     xmlns="http://www.w3.org/2005/sparql-results#" >   <head>     <variable name="subjectURI"/>     <variable name="predicateURI"/>     <variable name="objectURI"/>   </head>   <results ordered="false" distinct="false">     <result>       <binding name="predicateURI">         <uri>http://www.elegi.ecs.soton.ac.uk/ontology/elegi.ont.owl#participateWorkPackage</uri>       </binding>       <binding name="objectURI">         <uri>http://www.elegi.ecs.soton.ac.uk/ontology/elegi.ins.owl#WP5</uri>       </binding>     </result>     <result>       <binding name="predicateURI">         <uri>http://www.elegi.ecs.soton.ac.uk/ontology/elegi.ont.owl#knows</uri>       </binding>       <binding name="objectURI">         <uri>http://www.elegi.ecs.soton.ac.uk/ontology/elegi.ins.owl#john</uri>       </binding>     </result>     <result>       <binding name="predicateURI">         <uri>http://www.w3.org/1999/02/22-rdf-syntax-ns#type</uri>       </binding>       <binding name="objectURI">         <uri>http://www.elegi.ecs.soton.ac.uk/ontology/elegi.ont.owl#Person</uri>       </binding>     </result>     <result>       <binding name="predicateURI">         <uri>http://www.elegi.ecs.soton.ac.uk/ontology/elegi.ont.owl#affiliateTo</uri>       </binding>       <binding name="objectURI">         <uri>http://www.elegi.ecs.soton.ac.uk/ontology/elegi.ins.owl#UoS</uri>       </binding>     </result>     <result>       <binding name="predicateURI">         <uri>http://www.elegi.ecs.soton.ac.uk/ontology/elegi.ont.owl#participateWorkPackage</uri>       </binding>       <binding name="objectURI">         <uri>http://www.elegi.ecs.soton.ac.uk/ontology/elegi.ins.owl#WP7</uri>       </binding>     </result>   </results> </sparql>  table represenation: -------------------------------------------------------------------------------------------------------------------------------------------------------------------- | subjectURI|    predicateURI    |                                                                         objectURI                                                 | ==================================================================================================================================================================== | | <http://www.elegi.ecs.soton.ac.uk/ontology/elegi.ont.owl#participateWorkPackage> | NS:WP5 | | | <http://www.elegi.ecs.soton.ac.uk/ontology/elegi.ont.owl#knows> | NS:john | | | <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> | <http://www.elegi.ecs.soton.ac.uk/ontology/elegi.ont.owl#Person> | | | <http://www.elegi.ecs.soton.ac.uk/ontology/elegi.ont.owl#affiliateTo> | NS:UoS | | | <http://www.elegi.ecs.soton.ac.uk/ontology/elegi.ont.owl#participateWorkPackage> | NS:WP7 | --------------------------------------------------------------------------------------------------------------------------------------------------------------------

  10. Example usage of the SMS - 2

  11. Portlet development • Portal (reusing portlets) • End users oriented • 3rd party applications • J2EE • JSF/Portlet • Web service proxy (reusing services) • Oriented to customizable GUI designers • Delivered as WAR files • Business Logic of the semantic management functions • Based on Jena RDF API • Tomcat Axis Web service • Interface described in WSDL • Oriented to service consumers

  12. Query result in XML format (direct from the web service call)

  13. Aggregating portlets for customizable Portal • Portal (reusing portlets) • End users oriented • 3rd party applications • J2EE • JSF/Portlet • Web service proxy (reusing services) • Oriented to customizable GUI designers • Delivered as WAR files • Business Logic of the semantic management functions • Based on Jena RDF API • Tomcat Axis Web service • Interface described in WSDL • Oriented to service consumers

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