I'm thinking of trying to write a concordance which would run against certain linguistic grammatical rules to ignore items such as articles, pronouns and so on to try and return better results than here is every word, number of occurences and line positions in the text file.

I've taken a look at the Concordance Generator which Kurt Kincaid posted to Perlmonks as a starting point but are there any specific Perl modules around that are worth taking a look at on CPAN or am I best off defining words (and variations) to be ignored in a return block and parsing against these?

Thanks in advance for any help.