What does Lucene ScoreDoc.score mean?

Question

I am performing a logical query with several terms. I only want to process results with a score above a certain threshold. My problem is that I do not understand how this value is calculated. I understand that high numbers mean it is a good match, and low numbers mean it is a bad match, but there seems to be no upper bounds?

Can points be normalized over the range [0,1]?

Answer 1

Here is a page that describes how Lucene scores are calculated:

http://lucene.apache.org/java/3_0_0/scoring.html

, . , , .

, , - . , 2,5, 2.5, 0 1.