note Abigail-II <blockquote><em> Is there a module which can generate strings that satisfy a certain regular expression? </em></blockquote> <p> No. <p> That's a very hard question. For many types of grammars, this question is known to be non-solvable. IIRC, this includes regular expressions (the real ones, not the Perl ones). Perl regular expressions are hard to categorize, but they are certainly a superset of classical regular expressions. <p> This of course doesn't mean it's not possible for specific regular expressions. <p> Abigail 284513 284513