[ https://issues.apache.org/jira/browse/LUCENE-329?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Mark Harwood updated LUCENE-329: -------------------------------- Attachment: LUCENE-329.patch Updated following review comments (thanks, Adrien). All tests passing on trunk. > Fuzzy query scoring issues > -------------------------- > > Key: LUCENE-329 > URL: https://issues.apache.org/jira/browse/LUCENE-329 > Project: Lucene - Core > Issue Type: Bug > Components: core/search > Affects Versions: 1.2 > Environment: Operating System: All > Platform: All > Reporter: Mark Harwood > Assignee: Mark Harwood > Priority: Minor > Fix For: 5.x > > Attachments: ASF.LICENSE.NOT.GRANTED--patch.txt, LUCENE-329.patch, > LUCENE-329.patch, LUCENE-329.patch > > > Queries which automatically produce multiple terms (wildcard, range, prefix, > fuzzy etc)currently suffer from two problems: > 1) Scores for matching documents are significantly smaller than term queries > because of the volume of terms introduced (A match on query Foo~ is 0.1 > whereas a match on query Foo is 1). > 2) The rarer forms of expanded terms are favoured over those of more common > forms because of the IDF. When using Fuzzy queries for example, rare mis- > spellings typically appear in results before the more common correct > spellings. > I will attach a patch that corrects the issues identified above by > 1) Overriding Similarity.coord to counteract the downplaying of scores > introduced by expanding terms. > 2) Taking the IDF factor of the most common form of expanded terms as the > basis of scoring all other expanded terms. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org