Hi all, I just want to support Wolfgang here. These changes (the new Category/Arrow solution) passed me by completely (too many other things to do). But I can't really see any strong reason for breaking backwards compatibility here by not sticking with (>>>) as a method? In fact, given that Category interferes with the standard prelude, I wonder if it was considered making (<<<) and (>>>) and "identity" methods of Category, leaving (.) and "id" alone? Such a design would have been beneficial for a library like Yampa, would have minimized backwards compatibility issues, and would have simplified life for end users (saves them from hiding the prelude "id" and (.). Best, /Henrik -- Henrik Nilsson School of Computer Science The University of Nottingham nhn@cs.nott.ac.uk This message has been checked for viruses but the contents of an attachment may still contain software viruses, which could damage your computer system: you are advised to perform your own checks. Email communications with the University of Nottingham may be monitored as permitted by UK legislation.