> > I would like to lower or eliminate
> > the contribution of the fieldNorm
> > on some searches. I figured that a LocalParam might
> help,
> > but I cannot
> > find any documentation on it. Is there documentation on
> how
> > to reduce
> > the consideration for tf, idf, fieldNorm, and coord?
> Where
> > is that?
> 
> "omitNorms=true|false
> 
> This is arguably an advanced option. Set to true to omit the
> norms associated with this field (this disables length
> normalization and index-time boosting for the field, and
> saves some memory). Only full-text fields or fields that
> need an index-time boost need norms. "
> 
> http://wiki.apache.org/solr/SchemaXml

I just saw that you said "on some searches" it seems that you need to 
disable/enable it on the fly at query time. May be you can create two fields 
with with different omitNorms settings.

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