There's a mistake in the sample xml at https://wiki.apache.org/solr/AnalyzersTokenizersTokenFilters#solr.PatternCaptureGroupFilterFactory
In the XML snippet instead of class="solr.PatternCaptureGroupTokenFilter" you should have class="solr.PatternCaptureGroupFilterFactory" (ie, the title of the section.) If you want to grant me edit privs, I can fix it. Whatever. username: ChuckMccallum
