Interestingly, there is much to say about the theoretical problem of finding the smallest regular expression for a set of positive and negative examples. A nice

Interestingly, there is much to say about the theoretical problem of finding the smallest regular expression for a set of positive and negative examples. A nice overview: http://cstheory.blogoverflow.com/2011/08/on-learning-regular-languages/ http://cstheory.blogoverflow.com/2011/08/on-learning-regular...