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From "Bill Bell (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SOLR-3931) Turn off coord() factor for scoring
Date Thu, 11 Oct 2012 04:23:03 GMT
Bill Bell created SOLR-3931:
-------------------------------

             Summary: Turn off coord() factor for scoring
                 Key: SOLR-3931
                 URL: https://issues.apache.org/jira/browse/SOLR-3931
             Project: Solr
          Issue Type: Bug
    Affects Versions: 4.0
            Reporter: Bill Bell


We would like to remove coordination factor from scoring.

FOr small fields (like name of doctor), we want to not score higher if the same term is in
the field more than once. Makes sense for books, not so much for formal names.

/solr/select?q=*:*&coordFactor=false

Default is true.

(Note: we might want to make each of these optional - tf, idf, coord, queryNorm

coord(q,d) is a score factor based on how many of the query terms are found in the specified
document. Typically, a document that contains more of the query's terms will receive a higher
score than another document with fewer query terms. This is a search time factor computed
in coord(q,d) by the Similarity in effect at search time. 


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