Tutorial: [only for the desktop version] follow the magnifying lens (on the left besides this text in a maximized browser.)
Discussion: Challenges in Semantic Search, demo video: Ontology Assisted Search.

Document search in a wide document space can often deliver too many results. Restricting the results to some few documents might be a time and resource consuming task. On the other way a search might deliver to few results, because neither synonyms nor categories were given. In the first case the search needs a „reduction“ while in the second case it needs an „expansion“ of the results.

Thanks to the use of ontologies (or even of thesauri) reflecting structured information on domains, the search can be effectively trimmed to deliver less (reduction) or more (expansion) results. In the following demonstration based on medical documents some ontologies are predisposed to be used as a controlling tool in addition to your search query; their relations deliver upon your query semantical facets which can be used to reduce/expand the query results.

Let yourself go
(Notes)

Enjoy playing around changing the query, adding/retaining semantic relations/categories or changing the way how semantical facets should influence the results.

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