Hi, I noticed that the length is hardcoded to 4 in the PrefixFeatureGenerator and the SuffixFeatureGenerator. I made this value configurable in the XML for each feature generator. I also add a check for the length to keep duplicate prefixes or suffixes being returned. (If the token is "yes" with a length of 4 there would be two "yes" features returned.) If a value is not provided in the XML it uses the default value of 4.
You can preview the changes here: https://github.com/apache/opennlp/compare/master...jzonthemtn:prefixsuffix?expand=1 If this is a change that's desired by the group I can make a JIRA and a pull request. Thanks, Jeff
