An alternative to the selection of ranges is the possibility of selecting multiple values of a facet. However, this has its limitations for facets with a large number of values and is only possible for discrete values. Multiple selection is possible, for example, in option lists, lists of check-boxes and could also be implemented for tree maps. Multiple Selection is an important feature to allow the construction of complex queries with the help o...
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An alternative to the selection of ranges is the possibility of selecting multiple values of a facet. However, this has its limitations for facets with a large number of values and is only possible for discrete values. Multiple selection is possible, for example, in option lists, lists of check-boxes and could also be implemented for tree maps. Multiple Selection is an important feature to allow the construction of complex queries with the help of Faceted Browsing. However, please note that by Multiple Selection alone, the expressiveness of the constructed queries is still limited conjunctions of disjunctions such like (facetA=ValueX OR facetA=ValueY) AND (facetB=ValueZ). Since Faceted Classification in computer science usually allows the assigment of multiple values per facet. It would be useful to allow building queries that can represent conjunctions of values within one facet. Selecting a supertype requires that a hierarchical widget is employed. For instance all countries being part of Europe and Asia at the same time. An intuitive graphical representation for this definition could be challenging however.
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