re: Matching subrules

>Your grammar clearly does not preclude extra stuff  at the end of 
the 
> string and you do not specify that the string must  be completely 
> consumed. 

Thanks for the answers received so far. The /\D/  
after Criteria:zoekVraag was a typo, /\Z/ was  
intended; sorry for that. 

Experimenting so far with your solutions, it seems  
that completely consuming the string is the answer.  
Adding 'eostring' after 


basisZoekVraag (operator basisZoekVraag)(s) 

and defining eostring as /\Z/ results in the  
behaviour I want. I'm new to this kind of stuff, so  
your help was appreciated. 


Peter