A Snowball Stemmer builds a stem, or root, for each word in the document contexts. The root is determined by cutting off word endings. For example, a stem of geese is goose.
The output from the Snowball Stemmer is used by other semantic processors in the document analysis chain.
When to Use
If you have configured the Ontology Matcher, Rules Matcher, Fast Rules Matcher or Semantic Extractor for stem matches, you must define a Snowball Stemmer before it in the document analysis pipeline.