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

294 Selected Studies on Software and Information Systems
The use of XSLT in the user interface and query transformations provide high interface
flexibility, yet resulted in complicated templates that are tied to a specific RDF/XML
representation. Moreover, OntoViews does not take advantage of OWL metadata and
must be manually configured to use facets and link recommendation (e.g., via aforementioned
rules). It also has no support for personalization based on user preferences.
10.7.3 BrowseRDF: Faceted RDF Browser
BrowseRDF (Oren, Delbru, & Decker, 2006) is a faceted browser for Semantic Web data in
RDF format. BrowseRDF can automatically generate a faceted interface from arbitrary RDF
data with little manual configuration.
BrowseRDF extends typical faceted queries with RDF semantics, e.g. existential selection,
inverse selection, non-existential selection. Furthermore, it defines statistical metrics
for automatic facet ranking and adaptation, such as predicate balance, object cardinality
and predicate frequency.
Figure 10-21 shows the GUI of BrowseRDF in the domain of wanted FBI suspects. Individual
facets with new selection types are shown on the left, instance details are shown
in the center.
Similarly to OntoViews, BrowseRDF does not take advantage of OWL data and automatically
generates facets for all available RDF predicates, even those with little sense for
the end users. Moreover, it only employs statistical metrics computed from the supplied
RDF data and thus supports no personalization, nor link recommendation.
Figure 10-21. Example of the BrowseRDF GUI with existential facet restrictions (left),
taken from (Oren, Delbru, & Decker, 2006).