radha84 at gmail
May 6, 2009, 10:44 AM
Views: 1008
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Modifying score based on tf and slop
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Hi all,
All I have is a query running on a document with a single field which
has some search value. This is all which will be present.
No more documents / fields.
I have the following specific requirements
1) Length of document should not affect score - Implemented as per
lucene documentation using concept of Fair Similairty by making
lengthnorm as 1
2) The no of times a term in the query occurs in the search field
should not affect the score
3) I am using the spannearquery. Hence the slop should affect the score.
I implemented 2) by changing the tf to return 1 if freq >0 .
But this adversely affects 3) as the slop value is factored into the
tf ( as per what I can see in the span scorer)
How can I ensure the frequency of a certain term does not affect the
score while at the same ensuring that the slop does affect it ?
Thanks,
Radha
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Modifying score based on tf and slop
