elektronická verzia publikácie - FIIT STU - Slovenská technická ...

292 Selected Studies on Software and Information Systems
The main advantage of Factic is personalization support based on an automatically
acquired user model also via external user modeling tools (Andrejko et al., 2006). Personalization
includes the adaptation of facets and facet restrictions (e.g., active facets, inactive
facets, disabled facets) their annotation with additional information and recommendation
via ordering or background color.
Important is also the adaptation, annotation and recommendation of search results
with support for external personalized evaluation tools. Moreover, view adaptation can
customize the presentation of search results based on instance type (e.g., images in an image
matrix with thumbnails, job offers in a table).
Currently one important disadvantage is the slow performance of the underlying database
engine with semantic queries for larger datasets, which results in high response
times. Another possibly limiting performance factor might be the use of the Apache Cocoon
framework 5 and XML/XSLT transform view design pattern for presentation rendering.
10.7.2 Ontoviews: A Tool for Creating Semantic Web Portals
OntoViews (Mäkelä et al., 2004) is a comprehensive tool for the creation of Semantic Web
portals based on the Apache Cocoon framework and a service oriented architecture using
Ontogator as a view-based search service (Mäkelä et al., 2006). Ontoviews supports faceted
navigation over RDFS ontologies and link recommendation services via Ontodella.
Figure 10-19. Example of the OntoViews GUI, facets shown on the left,
search results shown on the right.
5
Apache Cocoon: http://cocoon.apache.org/ (last viewed 18.8.2009)