RE: [Snowball-discuss] porter2 question

From: Martin Porter (
Date: Fri Oct 04 2002 - 13:52:01 BST

> ... no 'OU' stripping in the 4th
>step any longer. Was that intentional?

Yes. In the old stemmer -s is removed from -ous early on so -ou- is removed
later to compensate, but in the new stemmer -s is not removed after -u-
(cactus, ferrous, locus etc) so -ous survives as an ending until step 4.

There has been some php work on the stemmers by "dark panda": You can find
the relevant correspondence if you put "php" in the front page search box -
but maybe you have found it already.


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