Interesting tip! Thanks! But i am wondering: Can this frame work stand the comparison with Perl-based regular expressions (i am thinking of such elements as .*? or [^ ] or multi-line pattern matching)?. AS to Cocoa: Two more quite intriguing Cocoa dev helping utilities seem to be: Accessorizer and class-dump ( homepage.mac.com/nygard/Porjects/ Or what do you think? (i am just beginning to explore this terra incognita called Cocoa) Best regards!