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From Vikas Gupta <vgu...@cs.utexas.edu>
Subject document boost not showing up in Explanation
Date Tue, 28 Dec 2004 02:54:10 GMT
I am using lucene-1.4.1.jar(with nutch). For some reason, the effect of
document boost is not showing up in the search results. Also, why is it
not a part of the Explanation

    Below is the 'explanation' of a sample query "solar". I don't see the
boost value (1.5514448) being used at all in the calculation of the
document score - from the 'explanation' below and also from the quality of
the search.

    How can I see the effect of document boost?

    Thanks.

-Vikas

--------------- a sample explanation ------------
page
docNo = 0
segment = 20041224185557
digest = 18cef64c6c53ecf399abfd9239caf240

----> boost = 1.5514448 <----(Vikas: not used in the calculation below)

lang = en
url = http://www.cs.utexas.edu/users/vgupta/web1/a31.html
anchor = Solar System jigsaw
anchor = a31.html
anchor = Solar System jigsaw
title = Solar System jigsaw
H1 = Solar System jigsaw

score for query: solar
0.7634825 = sum of:
 0.5878681 = weight(anchor:solar^2.0 in 0), product of:
 0.3017718 = queryWeight(anchor:solar^2.0), product of:
 2.0 = boost
 2.2039728 = idf(docFreq=2)
 0.06846087 = queryNorm
 1.9480551 = fieldWeight(anchor:solar in 0), product of:
 1.4142135 = tf(termFreq(anchor:solar)=2)
 2.2039728 = idf(docFreq=2)
 0.625 = fieldNorm(field=anchor, doc=0)
 0.010230478 = weight(content:solar in 0), product of:
 0.09287914 = queryWeight(content:solar), product of:
 1.3566749 = idf(docFreq=6)
 0.06846087 = queryNorm
 0.11014828 = fieldWeight(content:solar in 0), product of:
 1.7320508 = tf(termFreq(content:solar)=3)
 1.3566749 = idf(docFreq=6)
 0.046875 = fieldNorm(field=content, doc=0)
 0.16538392 = weight(H1:solar^1.5 in 0), product of:
 0.1393187 = queryWeight(H1:solar^1.5), product of:
 1.5 = boost
 1.3566749 = idf(docFreq=2)
 0.06846087 = queryNorm
 1.1870905 = fieldWeight(H1:solar in 0), product of:
 1.0 = tf(termFreq(H1:solar)=1)
 1.3566749 = idf(docFreq=2)
 0.875 = fieldNorm(field=H1, doc=0)



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