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Posted to dev@lucene.apache.org by "Michael McCandless (JIRA)" <ji...@apache.org> on 2013/10/16 16:45:41 UTC
[jira] [Updated] (LUCENE-5288) Add ProxBooleanTermQuery, like
BooleanQuery but boosting when term occur "close" together (in proximity)
in each document
[ https://issues.apache.org/jira/browse/LUCENE-5288?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Michael McCandless updated LUCENE-5288:
---------------------------------------
Attachment: LUCENE-5288.patch
> Add ProxBooleanTermQuery, like BooleanQuery but boosting when term occur "close" together (in proximity) in each document
> -------------------------------------------------------------------------------------------------------------------------
>
> Key: LUCENE-5288
> URL: https://issues.apache.org/jira/browse/LUCENE-5288
> Project: Lucene - Core
> Issue Type: New Feature
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Fix For: 4.6, 5.0
>
> Attachments: LUCENE-5288.patch
>
>
> This is very much a work in progress, tons of nocommits... It adds two classes:
> * ProxBooleanTermQuery: like BooleanQuery (currently, all clauses
> must be TermQuery, and only Occur.SHOULD is supported), which is
> essentially a BooleanQuery (same matching/scoring) except for each
> matching docs the positions are merge-sorted and scored to "boost"
> the document's score
> * QueryRescorer: simple API to re-score top hits using a different
> query. Because ProxBooleanTermQuery is so costly, apps would
> normally run an "ordinary" BooleanQuery across the full index, to
> get the top few hundred hits, and then rescore using the more
> costly ProxBooleanTermQuery (or other costly queries).
> I'm not sure how to actually compute the appropriate prox boost (this
> is the hard part!!) and I've completely punted on that in the current
> patch (it's just a hack now), but the patch does all the "mechanics"
> to merge/visit all the positions in order per hit.
> Maybe we could do the similar scoring that SpanNearQuery or sloppy
> PhraseQuery would do, or maybe this paper:
> http://plg.uwaterloo.ca/~claclark/sigir2006_term_proximity.pdf
> which Rob also used in LUCENE-4909 to add proximity scoring to
> PostingsHighlighter. Maybe we need to make it (how the prox boost is
> computed/folded in) somehow pluggable ...
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