29. A search engine as claimed in claim 28 , wherein said query analyser generates a plurality of said sections, and parses said sections to select a set of sections forming said query vector.
29. A search engine as claimed in claim 28 , wherein said query analyser generates a plurality of said sections, and parses said sections to select a set of sections forming said query vector. 31. A search engine as claimed in claim 29 , wherein said sections are key-centered phrase structure frames with a key grammatical category, and said query analyser executes frame instantiation on the terms of said query and generates a frame relation graph of said frames.