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Doron Cohen commented on LUCENE-1302: ------------------------------------- Another option is for BTQ to return a ComplexExplanation instead of Explanation and setMatch(true) if the score is non-zero. Still it would disturb to declare a "negative score" as a "match". > explain should not mask negative scores > --------------------------------------- > > Key: LUCENE-1302 > URL: https://issues.apache.org/jira/browse/LUCENE-1302 > Project: Lucene - Java > Issue Type: Bug > Components: Query/Scoring > Reporter: Doron Cohen > Assignee: Doron Cohen > Priority: Minor > Fix For: 2.4 > > Attachments: lucene-1302-explain-negative.patch > > > Explanation.isMatch() returns false for 0 or negative scores. > Hence negative scores are omitted from the explanation. > This causes, when using e.g. BoostingTermQuery with negative boosts, a > difference between the collected doc score and the score shown by explain(). > A word on the usage of this - BTQ with negative boosts is useful for > "punishing" documents for containing a term. It also allows all sorts of > tricks with multiplying query boost by the BTQ boost, so you get a positive > score if both boosts have the same sign but negative otherwise. - I am sure > there other uses as well. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]