[Snowball-discuss] porter2 question

[Martin Porter]

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

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.

Martin