Semantic Web Portals by fjn47816

VIEWS: 25 PAGES: 23

									             Semantic Web Portals

                State of the Art Survey




10.08.2010                                1
                                Definition
             • Semantic Web Portal
               – Central entry point for group with common interest
               – Infrastructure to share and exchange information
               – Based on semantic web technologies
                  • Ontology repositories, Web Services?, ??




10.08.2010                                                        2
                                Definition
             • Semantic Web Portal
               – Central entry point for group with common interest
               – Infrastructure to share and exchange information
               – Based on semantic web technologies
                  • Ontology repositories, Web Services?, ??
               – Semantically Interweaved Groupware Features?




10.08.2010                                                        3
                      Evaluation scheme
             • How to split a complex infrastructure?




10.08.2010                                              4
                              Evaluation scheme




             Grounding
                                Semantic Web      Ontology                         Semantic Web Services
             Technologies       Technologies




               System           Data Management              System (Web Server,OS. etc.)
               Technologies




10.08.2010                                                                                                 5
                                Evaluation scheme


                      Information Processing


               Collaboration
               Features                                      synchronous                          asynchronous




               information item workflow


                     Creation              Publication       Organization                Access               Maintenance




             Grounding
                                           Semantic Web         Ontology                          Semantic Web Services
             Technologies                  Technologies




               System                      Data Management                  System (Web Server,OS. etc.)
               Technologies




10.08.2010                                                                                                                  6
                                Evaluation scheme
                     Information Access
                                                             User Interface




                      Information Processing


               Collaboration
               Features                                      synchronous                            asynchronous




               information item workflow


                     Creation              Publication       Organization                  Access               Maintenance




             Grounding
                                           Semantic Web          Ontology                           Semantic Web Services
             Technologies                  Technologies




               System                      Data Management                    System (Web Server,OS. etc.)
               Technologies




10.08.2010                                                                                                                    7
                              Selected Portals
             •   Esperonto
             •   OntoWeb
             •   Emplois K42
             •   Mondeca ITM
             •   Others:
                 –   SWWS Portal
                 –   Mindswap
                 –   „Karlsruhe Portals“
                 –   OntoWebEdu




10.08.2010                                       8
             Esperonto




10.08.2010               9
             Esperonto




10.08.2010               10
                             Esperonto
             • WebODE Ontology Platform
               – Ontologies as meta data structure and
                 organization principle
             • Pure file system to store documents
             • No groupware / collaboration features
             • Poor user interface




10.08.2010                                               11
                             Technology                          Name, Release                           Comment
             Operating System             Windows 2000                                  Also Unix/Linux possible
                                                                                        Also tested with MySQL and available for
             Database                     Oracle 8.1.7
                                                                                        any JDBC compatible DBMS

             Document Repository          File system

                                                                                        Migration to a different product is
             Web Server                   Minerva Application Server + Tomcat
                                                                                        planned

             Applied Ontology             Five different domain ontologies

             Ontology Language            WebODE Knowledge Model                        OKBC compliant
             Export / Import              XCARIN, F-Logic, RDF(S), OIL, DAML+OIL, OWL   WebODE feature

             Inference Engine             OKBC based inference engine                   Used during ontology construction
                                                                                        Others are possible due to the import
             Ontology Editor              WebODE Ontology Editor, OntoDesigner, WAB
                                                                                        feature

             UI Technology                HTML, XML, JSP, Java applets


             Browser compatible           IE 5, Netscape 4,7 (or higher)


             Pricing / License            Free evaluation


             Product Website              http://webode.dia.fi.upm.es/sew/


             Demonstration Website        http://www.esperonto.net/




10.08.2010                                                                                                                      12
             OntoWeb




10.08.2010             13
                              OntoWeb
             • Based on ZOPE / CMF Framework
               – Publishing workflow, User concept, private
                 folders, ...
             • Ontology classes mapped to ZOPE Content
               Types
             • Matured User Interface
             • ...but how many semantics?




10.08.2010                                                    14
                      Technology                    Name, Release                                Comment
             Operating System           Linux/Unix, Windows NT

                                        K42 Server with own persistence           Optionally a relational database can be
             Database
                                        mechanism                                 deployed
             Document Repository        n/a

             Web Server                 TomCat v4.1.24

                                        TopicMap of XML Europe
             Applied Ontology
                                        Conference
                                                                                  In addition to the standard association
             Ontology Language          Topic Maps
                                                                                  templates are sup
             Export / Import            XTM

             Inference Engine           -

                                                                                  In addition any tool for creation of
             Ontology Editor            WebAuthor
                                                                                  TopicMaps (XTM-files) can be used
             Userinterface Technology   HTML, Javascript, Java Applet

             Broswer compatible         Intenert Explorer 5.5 SP2 or higher       For WebAuthor, TMV and Ontogen
                                                                                  product as stand-alone version is not
             Pricing / License          Free evolution
                                                                                  longer available (now part of k:ms)
             Demonstartion Site:        http://62.231.133.220/xmlus02-nav/index.html
             Product information        http://k42.empolis.co.uk/




10.08.2010                                                                                                                  15
             Empolis K42




10.08.2010                 16
                           Empolis K42
             • Infrastructure – not a complete portal
               – Based on Topic Maps + Association Templates
               – API to Access it
               – Topic Maps Editing Component, Standard
                 Visualization Techniques like hyperbolic tree




10.08.2010                                                       17
                      Technology                    Name, Release                       Comment
             Operating System            Linux


             Database                    ZOPE Object Data Base

             Document Repository         ZEO Server (part of ZOPE)           http://www.zope.org/Products/ZE
                                                                             O
             Web Server                  ZOPE Application Server 2.6.1       http://www.zope.org
             Applied Ontology            Domain Ontology + Portal Ontology
                                         (e.g. object types)
             Ontology Language           RDF(S) + extensions

             Export / Import             RDF(S)

             Inference Engine            -

             Ontology Editor             Outside of portal, portal admini-
                                         strators can modify the onto-logy
                                         (schema & instance data)
             User Interface Technology   CMF (part of ZOPE), Java Servlets

             Browser compatible          - IE 6.0 +
                                         - Netscape 4.7 and higher
                                         - Mozilla
             Pricing / License           Open source

10.08.2010                                                                                                     18
             Mondeca ITM




10.08.2010                 19
                            Mondeca ITM
             • Different Connectors to DMS
               – e.g. file system or custom DMS
             • Meta-ontologies
               – Modelling: Structure, Constraints, Access
                  • OWL, designed with Protege
                  • also Topic Maps as internal format
             • Gather Meta Data:
               – Linguistic tools (automatic)
               – MS Office meta data (semi automatic)
               – Via forms (manual)


10.08.2010                                                   20
                        Technology                      Name, Release                                  Comment
             Operating System           Unix, Linux, Windows


             Database                   Oracle 8i, 9i, PostGreSQL 7.2                     knowledge representation storage
             Document Repository        Any content management or file system

             Web Server                 BEA Web Logic, IBM Websphere, IPlanet,            Actually used :BEA WebLogic,
                                        JBoss                                             IBM Websphere
             Applied Ontology           Any client ontology compliant to                  ITM support any semantic
                                        DAML/OIL/OWL specification                        relationship between topics (Topic
                                                                                          Maps as basis)
             Ontology Language          Own model based on Topic Map and OWL
                                        (extendable). RDF also used
             Export / Import            OWL, XTM structured files            Only import. External ontology
                                                                             creation in OWL before import to
                                                                             ITM
             Inference Engine           -                                    Plans for integration of open-source
                                                                             OWL compliant inference engine
             Ontology Editor            ITM-Editor,                          Protégé for initial ontology
                                        Protégé (external)                   creation, updatable directly in ITM
             Userinterface Technology   HTML/Javascript

             Broswer compatible         IE 5/6, Netscape, Mozilla

             Pricing / License


             Demonstartion Site:        http://mondeca-publishing.com/publications/semantopic/
                                        anonymous/title10055.html
             Product information        http://www.mondeca.com/english/


10.08.2010                                                                                                                     21
                                   others
             • SWWS
               – Protege + RDQL
                  • Domain Ontology + separate Presentation Ontology
             • Mindswap
               – Embedded RDF docs, and ???
             • „Karlsruhe Portals“
               – KA², KAON, AIFB, ...
             • OntoWebEdu
               – CGI script generating HTML forms from an
                 Ontology


10.08.2010                                                             22
                                   Conclusion
             • Ontology Repositories as base technology still under
               development
                – Multi user support / versioning / different standards

             • Ontolgies as:
                – Meta data structure 
                – ease exchange and reuse 
                – Real time collaboration 
                – Integration of components 

             • Emphasis either on DMS or on Ontology Repository ...

             • Community Feature
                – ???



10.08.2010                                                                23

								
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