6. The method as claimed in claim 1 , including: receiving a query and processing the query to divide it into terms, including numerical terms; processing a numerical term of the query to a stem, the stem being in the form of a number, and a distance measurement of the numerical term to the stem, wherein a numerical term is a string of characters identified as a number by a numeric parser; and retrieving document results for the stem from an index.
9. The method as claimed in claim 6 , including scoring results by the similarity between two pieces of text including keywords and numbers, by expanding a cosine similarity measure by integrating distance measurement between numeric terms.