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Semantic-Based Navigation in Open Spaces 287
was less important. In the Semantic Web context, the data and metadata are “more equal”
and proper metadata (i.e., navigation) visualization approaches are desirable. Especially if
many generated links should be presented to the user, they must be organized in a sensible
and easy to understand way.
Figure 10-12. Sample GUI of our faceted browser Factic. Facets are shown on the left (green and
blue backgrounds), results in the center (white background), current restrictions and available actions
at the top (pink and blue background).
− Classical “text-based” visualization is most often used in simple interfaces, where
links are represented via text or images (see Figure 10-13).
Figure 10-13. Example of classical text-based navigation visualization. Links are implemented as text
(blue) or images respectively.
− Visual navigation uses interactive visualization approaches, which might depict the
structure of the information space to provide users with a better description of the information
domain (Figure 10-14). For example, graph visualization approaches (Al-