[LUCENE-5175] Add parameter to lower-bound TF normalization for BM25 (for long documents)

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Component/s: core/search
• Lucene Fields: New, Patch Available
• Assignee: Unassigned
• Reporter: Tom Burton-West
• Created: 13/Aug/13 16:01
• Updated: 28/Aug/22 13:51

Description

In the article "When Documents Are Very Long, BM25 Fails!" a fix for the problem is documented. There was a TODO note in BM25Similarity to add this fix. I will attach a patch that implements the fix shortly.