note dragonchild Actually, I think that your attempt at humor was actually a good idea, in disguise. I can see where one would like roles to be exclusionary - if <code>$foo does X</code>, that means you cannot have <code>$foo does Y</code>, so there should be a way of specifying that in the definitions of X and Y. But, as I said earlier, this is starting to sound like Prolog. (Not necessarily a bad thing, mind you ...) <!-- Node text goes above. Div tags should contain sig only --> <div class="pmsig"><div class="pmsig-85580"> <p>------ <br><i>We are the carpenters and bricklayers of the Information Age.</i> <p><i>Then there are Damian modules.... *sigh* ... that's not about being less-lazy -- that's about being on some really good drugs -- you know, there is no spoon.</i> - [flyingmoose] <p>I shouldn't have to say this, but any code, unless otherwise stated, <i>is <b>untested</b></i> </div></div> 384858 384878