Semantic Web based Collaborative Knowledge Management

Semantic Web based


Collaborative Knowledge Management

LSL, ECS

Feng (Barry) Tao


A generic SOA for managing semantics driven domain knowledge

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)


Ontology Engineering

ns
:
barry
ns
:
UoS
Tao
ns
:
WP
5
ns
:
John
Ont
:
affiliateTo
Ont
:
LastName
Ont
:
Workpackage
Ont
:
know
Ont
:
Organisation
Ont
:
Person
XMLSchema
:
string
Ont
:
Workpackage
Ont
:
Person
Ont
:
Deliverable
Is
-
a
Is
-
a
Is
-
a
Is
-
a
Is
-
a
Is
-
a
ns
:
D
51
Ont
:
deliver
XMLSchema
:
string
Is
-
a
Semantic
Management
Services
Ont
:
Name
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



ns
:
barry
ns
:
WP
5
Ont
:
Workpackage
Ont
:
Person
Is
-
a
1
RDF Triples of the Semantic
Annotation

ns
:
barry
ns
:
WP
5
Ont
:
Workpackage
Ont
:
Person
Is
-
a
Subject

predicate

object

Business Logic Service Node
ontology
Semantic
annotations
(
binding triples
)
Domain data
Ontology API such as Jena
,
Protégé OWL API
Semantic Management Service Core Functionality Java implementation
Web Service Interface in WSDL
Ontology
management
Semantic
Annotation
Semantic
Query
Knowledge
reuse
Portlet Service Node
JSR
168
Portlets
(
WARs
)
Ontology
registry
Portlet
Annotator
Portlet
Triple
Query
Portlet
Web Service Proxy
Portal Server Node
Business Logic Service Developer
,
GUI designer
/
Service reuse
End User
JSF Node
Jave Server Face
End user node
(
Browser
)
End user node
(
Browser
)
End user node
(
Browser
)
Customized
/
Personalised
Portal
1
End user PC
3
rd
party
Stand
along
application
Customized
/
Personalised
Portal
2
Semantic
Management
Wizard
Web Service
Proxy
Technical Architecture

•

Business Logic of the semantic
management functions

•

Based on Jena RDF API

•

Tomcat Axis Web service

•

Interface described in WSDL

•

Oriented to service consumers

•

J2EE

•

JSF/Portlet

•

Web service proxy
(reusing services)

•

Oriented to customizable
GUI designers

•

Delivered as WAR files

•

Portal (reusing portlets)

•

End users oriented

•

3
rd

party applications

Semantic Management Services

•
Tomcat Axis web
service

•
Managing
ontology

•
Semantically
annotating
resources

•
Semantic query of
the annotated
resource

Sequence Diagram of using the
semantic management services

Example usages of the SMS

// semantic query


// query the semantic annotations as triples (subject, predicate, object)


SemanticQuery.
querySubject(subjectURI, ontologyName)


subjectURI =

tom


ontologyName =
photo



results:






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|

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|


-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
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-
-
-
-
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-





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"/>

<v
ariable

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>

<bin
ding

name="objectURI">

<uri>http://www.elegi.ecs.soton.ac.uk/ontology/elegi.ins.owl#WP5</uri>

</binding>

</res
ult>

<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#jo
hn</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/onto
logy/elegi.ont.owl#Person</uri>

</binding>

</result>

<result>

<binding

name="predicateURI">

<uri>htt
p://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>

<bindi
ng

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 |

-----------------------------------------------------------------------------------------------------------------------------
---
------------------------------------


Example usage of the SMS
-

2

Business Logic Service Node
ontology
Semantic
annotations
(
binding triples
)
Domain data
Ontology API such as Jena
,
Protégé OWL API
Semantic Management Service Core Functionality Java implementation
Web Service Interface in WSDL
Ontology
management
Semantic
Annotation
Semantic
Query
Knowledge
reuse
Portlet Service Node
JSR
168
Portlets
(
WARs
)
Ontology
registry
Portlet
Annotator
Portlet
Triple
Query
Portlet
Web Service Proxy
Portal Server Node
Business Logic Service Developer
,
GUI designer
/
Service reuse
End User
JSF Node
Jave Server Face
End user node
(
Browser
)
End user node
(
Browser
)
End user node
(
Browser
)
Customized
/
Personalised
Portal
1
End user PC
3
rd
party
Stand
along
application
Customized
/
Personalised
Portal
2
Semantic
Management
Wizard
Web Service
Proxy
Portlet development

•

Business Logic of the semantic
management functions

•

Based on Jena RDF API

•

Tomcat Axis Web service

•

Interface described in WSDL

•

Oriented to service consumers

•

J2EE

•

JSF/Portlet

•

Web service proxy
(reusing services)

•

Oriented to customizable
GUI designers

•

Delivered as WAR files

•

Portal (reusing portlets)

•

End users oriented

•

3
rd

party applications

Query result in XML format

(direct from the web service call)

Business Logic Service Node
ontology
Semantic
annotations
(
binding triples
)
Domain data
Ontology API such as Jena
,
Protégé OWL API
Semantic Management Service Core Functionality Java implementation
Web Service Interface in WSDL
Ontology
management
Semantic
Annotation
Semantic
Query
Knowledge
reuse
Portlet Service Node
JSR
168
Portlets
(
WARs
)
Ontology
registry
Portlet
Annotator
Portlet
Triple
Query
Portlet
Web Service Proxy
Portal Server Node
Business Logic Service Developer
,
GUI designer
/
Service reuse
End User
JSF Node
Jave Server Face
End user node
(
Browser
)
End user node
(
Browser
)
End user node
(
Browser
)
Customized
/
Personalised
Portal
1
End user PC
3
rd
party
Stand
along
application
Customized
/
Personalised
Portal
2
Semantic
Management
Wizard
Web Service
Proxy
Aggregating portlets for customizable Portal

•

Business Logic of the semantic
management functions

•

Based on Jena RDF API

•

Tomcat Axis Web service

•

Interface described in WSDL

•

Oriented to service consumers

•

J2EE

•

JSF/Portlet

•

Web service proxy
(reusing services)

•

Oriented to customizable
GUI designers

•

Delivered as WAR files

•

Portal (reusing portlets)

•

End users oriented

•

3
rd

party applications