Displaying 1 result from an estimated 1 matches for "lucenedatabase".
2013 Sep 02
2
Backend for Lucene format indexes-How to get doclength
On Mon, Sep 02, 2013 at 09:21:48AM +0800, jiangwen jiang wrote:
> TfIdfWeight and BM25(b=0) also need wdf_upper_bound, it is not exists in
> Lucene backends.
If you don't provide an implementation of wdf_upper_bound(), the default
is to use the collection frequency of the term, so provided that
information is available in the lucene files, the lack of
wdf_upper_bound information