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174 Selected Studies on Software and Information Systems
Presentation
Presentation Tool A
Form Presentation
Presentation Tool B
...
SCRUD Support
Form Generator
Bean Generator
Ontology-Object Mapper
Domain Model Tools
Domain Entity Acquision
Search Tool
...
User Modeling Tools
User Model Acquision
User Model Analysis
User Action Logging
...
MVC Based Framework
Common Configuration
Security
User Management
Portlet Management
Corporate Memory
Domain Ontologies
User Ontology
Event Ontology
Domain Knowledge Bases
User Profiles
User Action Logs
Figure 6-5. JOP architecture overview.
At the bottom of the architecture the corporate memory is placed which stores the domain,
user and event ontologies. As storage, the Sesame 3 ontological repository is used. To access
it, the offered sesame API is used by modules which need to work with it. The second layer
includes the common modules for configuration, security, user management and portlet
management. These modules are provided by the portal block of the Cocoon framework.
The next layer contains different functional modules. First, the SCRUD support component,
which performs the persistent operations over the domain data entities [11, 13]. Second, the
domain model tools with various functionality required in the particular domain. Third, the
user modeling tools for the acquisition, analysis of the user model. The top layer contains
the presentation tools.
The first two layers of the architecture together with the SCRUD support are domain
independent and can be used in different Semantic web portals (highlighted parts in the
figure). The rest components include tools tailored or configured to a given job offer domain.
This includes for example tool Factic, SemanticLog, and JDBSearch. Factic is a personalized
semantic faceted browser. Its aim is to navigate the user in large information space to find
relevant information. The user can restrict the information space using facets to search
3 http://www.openrdf.org/