Paul Elschot wrote:
Op Thursday 04 September 2008 20:39:13 schreef Mark Miller:
Sounds like its more in line with what you are looking for. If I
remember correctly, the phrase query factors in the edit distance in
scoring, but the NearSpanQuery will just use the combined idf for
each of the terms in it, so distance shouldnt matter with spans (I'm
sure Paul will correct me if I am wrong).
SpanScorer will use the similarity slop factor for each matching
span size to adjust the effective frequency.
The span size is the difference in position between the first
and last matching term, and idf is not used for scoring Spans.
The reason why idf is not used could be that there is no basic
score value associated with inner spans; only top level spans
are scored by SpanScorer.
For more details, please consult the SpanScorer code.
Regards,
Paul Elschot
Right, my fault, its the query normalization in the weight which uses
idf (by pulling from each clause in the span). So its kind of factored
into the score, but not in the way I implied. Sorry, my bad on the info.
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