[Xapian-discuss] Making Title Fields Have More Weight In Xapian
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Richard Boulton
richard at lemurconsulting.com
Thu Jul 26 11:45:17 BST 2007
James Aylett wrote:
> 100 is pretty dramatic, but you might want to achieve that (say you
> have a field which normally contains nothing, but is very, very
> important when it contains something). weight is a double, so anything
> that will fit in that (which is quite a big range :-) is fine.
Actually, I believe that values supplied to "weight" in scriptindex
files are integers - the value is used as a multiplier for the wdf - so
if the weight is 5, a term with 2 occurrences in a document will be
stored with a wdf of 10. As long as the resulting value doesn't
overflow int, there won't be any weird effects, but I don't think we
check for overflow. You could probably use up to 10,000 without any
fear of problems, even for large documents, but whether that would
actually be useful is debatable.
--
Richard
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