2. The method of claim 1 , wherein determining the plurality of association rules includes looking up the search term in a subject-matter ontology to identify at least one keyword that is ontologically related to the search term.
1. A method for performing a search, the method comprising: receiving, by at least one computing processor, a search request including a search term; determining, by the at least one computing processor, a plurality of association rules that are each a logical implication that an appearance of the search term follows from an appearance, in a corpus of data, of one or two keywords that are ontologically related to the search term; generating, by the at least one computing processor, a search matrix having a plurality of cells, and having axes labeled with a plurality of keywords that are ontologically related to the search term, wherein at least two cells of the search matrix are associated with respective association rules of the plurality of association rules; transmitting, by the at least one computing processor, the search matrix to a source of the search request; receiving, by the at least one computing processor, a cell selection of the search matrix from the source of the search request, wherein the cell selection includes multiple cells; generating, by the at least one computing processor, an augmented search string including the search term conjunctively joined with disjunctively joined sets of conjunctively joined keywords, wherein each set of conjunctively joined keywords corresponds to a cell included in the cell selection, and wherein the conjunctively joined keywords of each set are the keywords of the association rule of the respectively corresponding cell; and performing, by the at least one computing processor, a search using the augmented search string.