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Posted to dev@lucene.apache.org by "Yonik Seeley (JIRA)" <ji...@apache.org> on 2010/08/20 22:29:16 UTC
[jira] Commented: (SOLR-2058) Adds optional "phrase slop" to
edismax "pf2", "pf3" and "pf" parameters with field~slop^boost syntax
[ https://issues.apache.org/jira/browse/SOLR-2058?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12900849#action_12900849 ]
Yonik Seeley commented on SOLR-2058:
------------------------------------
Map<Integer,Map<String,Float>> is an "interesting" way to encode the slop and the boost :-)
But perhaps we should make a FieldParams class?
We could keep the separate pf,pf2,pf3 maps... or encode the number of terms to make phrases out of in the FieldParams class:
{code}
class FIeldParams {
int wordGrams; // make bigrams if 2, trigrams if 3, or all if MAX_INT
int slop;
float boost;
}
{code}
> Adds optional "phrase slop" to edismax "pf2", "pf3" and "pf" parameters with field~slop^boost syntax
> ----------------------------------------------------------------------------------------------------
>
> Key: SOLR-2058
> URL: https://issues.apache.org/jira/browse/SOLR-2058
> Project: Solr
> Issue Type: Improvement
> Components: SearchComponents - other
> Affects Versions: 3.1, 4.0
> Environment: n/a
> Reporter: Ron Mayer
> Priority: Minor
> Attachments: pf2_with_slop.patch
>
>
> http://mail-archives.apache.org/mod_mbox/lucene-solr-user/201008.mbox/%3C4C659119.2010007@0ape.com%3E
> {quote}
> From Ron Mayer <r....@0ape.com>
> ... my results might be even better if I had a couple different "pf2"s with different "ps"'s at the same time. In particular. One with ps=0 to put a high boost on ones the have the right ordering of words. For example insuring that [the query]:
> "red hat black jacket"
> boosts only documents with "red hats" and not "black hats". And another pf2 with a more modest boost with ps=5 or so to handle the query above also boosting docs with
> "red baseball hat".
> {quote}
> [http://mail-archives.apache.org/mod_mbox/lucene-solr-user/201008.mbox/%3CAANLkTimd+V3g6d_MnHP+JYkKd+dej8FVMvF_1LQoiLBU@mail.gmail.com%3E]
> {quote}
> From Yonik Seeley <yo...@lucidimagination.com>
> Perhaps fold it into the pf/pf2 syntax?
> pf=text^2 // current syntax... makes phrases with a boost of 2
> pf=text~1^2 // proposed syntax... makes phrases with a slop of 1 and
> a boost of 2
> That actually seems pretty natural given the lucene query syntax - an
> actual boosted sloppy phrase query already looks like
> {{text:"foo bar"~1^2}}
> -Yonik
> {quote}
> [http://mail-archives.apache.org/mod_mbox/lucene-solr-user/201008.mbox/%3Calpine.DEB.1.10.1008161300510.6335@radix.cryptio.net%3E]
> {quote}
> From Chris Hostetter <ho...@fucit.org>
> Big +1 to this idea ... the existing "ps" param can stick arround as the
> default for any field that doesn't specify it's own slop in the pf/pf2/pf3
> fields using the "~" syntax.
> -Hoss
> {quote}
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