Displaying 1 result from an estimated 1 matches for "doclength_lower_bound".
2013 Jun 16
3
Backend for Lucene format indexes-How to get doclength
...vx/.tvd/.tvf)
delete document(.del) are not supported, skip list in .fdx is not supported
too
example/quest.cc is used to test this demo. query like this:
field_name:term, or file_name:term1 AND field_name:term2
Until now, I found some data needed for BM25 in Xapian are not existed in
Lucene:
1. doclength_lower_bound?doclength_upper_bound
2. wdf_lower_bound?wdf_uppper_bound
3. total_length
4. doclength(for each document)
1-3 are statistics data, can be caculated when doing copydatabase, and
store them in somewhere. But doclengh is
hard to do this way.
1. some other data instead of doclength?
2. Xapian support...