12. The computer-readable media of claim 11 , further comprising program instructions for: determining a set of candidate passages from the set of references to information passages associated with the semantic query key term obtained from the inverted index, comprising: determining a relevance score for at least one semantic query token matching a semantic index token; and filtering the set of candidate information passages based at least in part upon the relevance score; and returning the filtered set of candidate information passages as a set of match candidates.
12. The computer-readable media of claim 11 , further comprising program instructions for: determining a set of candidate passages from the set of references to information passages associated with the semantic query key term obtained from the inverted index, comprising: determining a relevance score for at least one semantic query token matching a semantic index token; and filtering the set of candidate information passages based at least in part upon the relevance score; and returning the filtered set of candidate information passages as a set of match candidates. 13. The computer-readable media of claim 12 , further comprising program instructions for: obtaining a semantic representation of the search query, the semantic representation of the search query comprising at least one semantic substructure; generating a semantic query token from the at least one semantic substructure; associating the semantic query token with the semantic query key term; obtaining a semantic representation of the information passage, the semantic representation of the information passage comprising at least one semantic substructure; matching the semantic representation of the information passage with the semantic representation of the search query for at least one of the match candidates; filtering the match candidates based at least in part upon the results of the matching; and returning the filtered set of match candidates as a search result set.