Admistrators can use the Enrich and Clean feature to generate AND or OR facets.
Both are displayed next to checkboxes.
Users can select several facet values for a given search.
On the other hand, it is not possible to generate MONOVALUED facets.
This is due to the fact that the feature generates tree facets regardless of whether the user selects a hierachical display or a flat display. For a flat display, newly generated tree facets have an actual depth of a single level. As such, it is impossible to apply a MONOVALUED facet.
Users can only select one facet value at a time. Selecting a facet value automatically unselects the previously selected value.