Displaying 1 result from an estimated 1 matches for "formula_norm".
2013 Aug 25
2
Backend for Lucene format indexes-How to get doclength
On Tue, Aug 20, 2013 at 07:28:42PM +0800, jiangwen jiang wrote:
> I think norm(t, d) in Lucene can used to caculate the number which is
> similar to doc length(see norm(t,d) in
> http://lucene.apache.org/core/3_5_0/api/all/org/apache/lucene/search/Similarity.html#formula_norm).
It sounds similar (especially if document and field boosts aren't in use),
though some places may rely on the doc_length = sum(wdf) definition - in
particular, some other measure of length may violate assumptions like
wdf <= doc_length.
For now, using weighting schemes which don't us...