: I think any situation where you need to out-smart your tokenizer. For : example, maybe you have a tokenizer such as StandardTokenizer and you : are pretty happy with how it works overall, but you want to customize : how some specific characters behave.
thanks robert .. i updated the solr wiki to try and make this type of info more clear (and cribed from you verbatim)... http://wiki.apache.org/solr/AnalyzersTokenizersTokenFilters -Hoss
