: I have a question about using the "protected=" attribute with : SnowballPorterFilterFactory filter.
SnowballPorterFilterFactory doesn't (and has never) supported a protwords option ... that feature is unique to the EnglishPorterFilterFactory. this is probably just due to how they came about back in the pre-Apache days of Solr ... the lucene SnowballFilter has to use reflection because of the way the underlying Snowball Stemmer API works, and the SnowballPorterFilterFactory just generates intsances of SnowballFilter. Yonik wrote EnglishPorterFilterFactory to be more efficient by not doing the reflection (at the expense of being hardcoded to use English) and when the protwords feature was needed later it looks like it was only added there. adding a protwords option to SnowballPorterFilterFactory would be possible, but the best way to do it would probably be to add support in the underlying Lucene-Java class, then add a config option for it in Solr. (if anyone is so inclined) -Hoss
