[Snowball-discuss] porter2 stemmer overstemming the letter e

Vincent Li vincent.li at formicary.net
Mon Nov 24 01:13:04 GMT 2008


Hi there I have a quick question about the porter2 stemmer overstemming
the letter 'e' at the end of english words. At a glance, this appears to
be quite common as I noticed two from the sample vocab on

http://snowball.tartarus.org/algorithms/english/stemmer.html

console -> consol
conspire -> conspir

vintage -> vintag


I wont be surprised if there is somthing I am missing here, and would be
glad if someone can enlighten me as to why the stemmer does this.

I discovered this while I was trying to inject wordnet symonyms into
stemmed search queries and noticed the search didnt pickup any symonyms
for vintage. I thought about adding this as an exception, but I noticed
the two entries in the sample vocabulary on the english stemmer site and
thought it might be a common thing.

Just here to check if this is more of a feature than a bug really. It
would be great for symonym searching if there was some general rule for
putting the letter 'e' back in to some of these words. :)

Many thanks in advance,

Vincent

P.S. is there a way to search through the archive of this email list?
Apologies if this question was addressed before, I tried but failed to
find a search.


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