see http://wiki.apache.org/solr/AnalyzersTokenizersTokenFilters#solr.WordDelimiterFilterFactory
from the wiki Example of generateWordParts="1" and catenateWords="1": "PowerShot" -> 0:"Power", 1:"Shot" 1:"PowerShot" (where 0,1,1 are token positions) "A's+B's&C's" -> 0:"A", 1:"B", 2:"C", 2:"ABC" "Super-Duper-XL500-42-AutoCoder!" -> 0:"Super", 1:"Duper", 2:"XL", 2:"SuperDuperXL", 3:"500" 4:"42", 5:"Auto", 6:"Coder", 6:"AutoCoder" One use for WordDelimiterFilter is to help match words with different delimiters. One way of doing so is to specify generateWordParts="1" catenateWords="1" in the analyzer used for indexing, and generateWordParts="1" in the analyzer used for querying. Given that the current StandardTokenizer immediately removes many intra-word delimiters, it is recommended that this filter be used after a tokenizer that leaves them in place (such as WhitespaceTokenizer).
