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From Apache Wiki <>
Subject [Solr Wiki] Trivial Update of "DisMaxQParserPlugin" by Bill Bell
Date Sun, 06 Feb 2011 05:48:18 GMT
Dear Wiki user,

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The "DisMaxQParserPlugin" page has been changed by Bill Bell.


  The default value is 100% (all clauses must match)
  In Solr 1.4 and prior, you should basically set mm=0 if you want the equivilent of q.op=OR,
and mm=100% if you want the
- equivilent of q.op=AND.
+ equivilent of q.op=AND. In 3.x and trunk the default value of mm is dictated by the q.op
+ param (q.op=AND => mm=100%; q.op=OR => mm=0%).
  === pf (Phrase Fields) ===
  Once the list of matching documents has been identified using the "fq" and "qf" params,
the "pf" param can be used to "boost" the score of documents in cases where all of the terms
in the "q" param appear in close proximity.

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