elektronická verzia publikácie - FIIT STU - Slovenská technická ...
elektronická verzia publikácie - FIIT STU - Slovenská technická ...
elektronická verzia publikácie - FIIT STU - Slovenská technická ...
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Semantic-Based Navigation in Open Spaces 297<br />
Several solutions provided support for link generation though this was limited to<br />
links between instances related via predefined properties or clusters. None of the examined<br />
solutions apart from our faceted browser Factic supported personalization, although<br />
there was limited support for content-based adaptation – linking to related instances<br />
and sorting based on statistical metrics.<br />
The most used visualization approach seems to be textual visualization in tables. No<br />
solution employed any kind of advanced visual/graph-based presentation approach for<br />
navigation, or for actual content though /facet employed timeline visualization to show<br />
temporal distribution of instances.<br />
Table 10-1. Overview of navigation solutions.<br />
Factic<br />
(faceted<br />
browser)<br />
OntoViews<br />
(faceted<br />
browser)<br />
BrowseRDF<br />
(faceted<br />
browser)<br />
/facet<br />
(faceted<br />
browser)<br />
IGroup<br />
(keywordbased,<br />
query-byexample)<br />
Flamenco<br />
(faceted<br />
browser)<br />
RB++<br />
(view-based<br />
search)<br />
Semantic<br />
support<br />
OWL<br />
RDFS<br />
RDF<br />
Link<br />
generation<br />
Yes<br />
Yes, related<br />
instances<br />
Yes<br />
Adaptivity Personalization Visualization<br />
Adaptation,<br />
annotation and<br />
recommendation<br />
of facets, restrictions,<br />
results<br />
Related instances<br />
Statistical facet<br />
ranking<br />
Yes, automatic<br />
user modeling<br />
No<br />
No<br />
RDFS Yes No No<br />
No<br />
Yes, clusters<br />
No<br />
No<br />
No Yes No No<br />
No No No No<br />
Text/images<br />
and tables<br />
Text/images<br />
and tables<br />
Test and<br />
tables<br />
Text/images<br />
and tables,<br />
timeline<br />
Text/images<br />
and tables<br />
Text/images<br />
and tables<br />
Text and<br />
tables<br />
10.8 Looking Ahead<br />
We identified several problems in the previous sections, such as the size and dynamics of<br />
open information spaces, which current information retrieval systems must deal with.<br />
While existing search engines are definitely not ideal, they are still pretty good at what<br />
they do – gathering metadata and building indices. Although, there is steady progress in<br />
keyword-based search engine improvement, we believe that this area is not interesting<br />
enough to warrant further attention and thus leave it to others. Furthermore, additional<br />
approaches already exist that can classify documents (web pages) and create metadata<br />
where they are unavailable (albeit they are not used much in practice and of somewhat<br />
questionable quality).
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