Actualy, that is what I want it for. I've got code that's parsing apart web pages to extract data, and I want it to know when it's not extracting the data correctly. The prototype regex code is used so the parser can generate a 'signature' (regex) that describes the data to be extracted (based on an example set) which it can use to validate that further information matches the same 'signature'.

As far as the parsing logic, we're using landmark based location identification. Move forward past 'New Questions', move forward past 'lastnode_id', move forward past '>', extract to '<'. And so on...

Kyle