Hi Guys,
Why does the use synonyms decrease relevancy of the returned
results?
Running query 'Xapian::Query((Zserendip:(pos=1) AND
Zjacket:(pos=2)))'
3 results found
Estimated matches: 3
ID 39896 100% Serendipity Jacket mens
ID 39947 98% Serendipity Hiking Jacket womens
ID 39964 90% Serendipity Jacket womens
But with synonyms the relevancy is decreased.
Running query 'Xapian::Query((Zserendip:(pos=1) AND
(Zjacket:(pos=2)
OR Zcoat:(pos=2) OR Zparka:(pos=2))))'
3 results found
Estimated matches: 3
ID 39947 72% Serendipity Hiking Jacket womens
ID 39896 64% Serendipity Jacket mens
ID 39964 58% Serendipity Jacket womens
Obviously this is because more terms are involved, but is
this
correct, or can it be disabled so that the synonyms count as
just one
term with regards to relevancy?
Normally I set a floor of a certain amount of relevancy
before I
present results to the user, but since synonyms decrease the
relevancy I may need to change that, but doing that could
lead to
poor results being returned when it may make more sense to
say no
results were found.
Thanks,
Rusty
P.S. Olly, Wellington is a wonderful city that I've had the
pleasure
to visit many times now, I think you'll find it quite nice.
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