Gertjan van Noord and Dale Gerdemann
In order to be able to experiment with such complex finite-state operations the FSA Utilities (version 5) provides an extendible regular expression compiler. The paper discusses the regular expression operations provided by the compiler, and the possibilities to create new regular expression operators. The benefits of such an extendible regular expression compiler are illustrated with a number of examples taken from recent publications in the area of finite-state approaches to NLP.