Re: invertability and idempotence

>You are referring here to invertability, rather than idempotence.

The discussion had referred to idempotency up until that point, and I
didn't want to introduce new terminology. But referring to this:

>    generate(parse(msg)) == msg

as "idempotency" is perfectly valid in my opinion (as in, applying an
operation multiple times produces the same result). 

-- 
Andrew McNamara, Senior Developer, Object Craft
http://www.object-craft.com.au/