Abstract: Review and filtering of search results is facilitated by providing additional types of results beyond links to existing documents can be provided in addition to or in place of links to existing documents. These additional results can facilitate modifying a search request to filter out unwanted documents. The additional results, when in the form of content display objects and/or application display objects, can also provide the user with varying levels of information detail. In some preferred embodiments, an ontology based knowledge base can be leveraged in order to facilitate providing and filtering the results.