25 apr 2006 kl. 19.34 skrev Doug Cutting:
karl wettin wrote:
This could lead me to believe I can use different boost for
fields with the same name within one document.
You can. The values are multiplied to produce the final boost
value for the field. This is described in:
http://lucene.apache.org/java/docs/api/org/apache/lucene/document/
Field.html#setBoost(float)
It's not really the same thing as I tried to describe though. In the
end it is the same boost for all field values. I would personally
prefer to set that manually per unique field name. I have a hard time
to figure out why I want to add multiple boosts and then normalise
them. Is there some feature I missed?
How about refactoring fields to something like:
[Document](fieldName)<#>---- {0..1} ->[Field +boost]<#>---- {0..*}
-> [FieldValue +store +index +termVector]
That would be a big, incompatible change to one of Lucene's primary
APIs, no?
Not if I got it right in my head. Then it's really just a matter of
handling deprication. The field-methods in Document could be the same.
Long-term, an API which supports per token boosting will probably
prove useful, as a part of #11 on http://wiki.apache.org/jakarta-
lucene/Lucene2Whiteboard. When this happens it would probably be
worth considering making the change you suggest, but I'm not sure
it would be worth it before that.
I've wanted that feature a few times. Let me know if there is
something I can do to help when the time is right.
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