Another effect I do not understand ist the queryNorm which differs between
documents, reading the documents I assumed them to be constant.
>From the lucene documentation
<http://lucene.apache.org/core/3_0_3/api/all/org/apache/lucene/search/Similarity.html>
:
> queryNorm(q) is a normalizing factor used to make scores between queries
> comparable. This factor does not affect document ranking (since all ranked
> documents are multiplied by the same factor), but rather just attempts to
> make scores from different queries (or even different indexes) comparable.
>
this is from the scoring of the first results
{
"value": 0.0059806756,
"description": "queryNorm"
}
others have:
{
"value": 0.0031318406,
"description": "queryNorm"
}
as the queryNorm finally _does_ affect document ranking i am asking myself
if i am doing something wrong ...
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