Attributes seem like they might be useful, but I have no idea how to use them because they don't show up in the event editor, am I missing something?
The the extent to which the wiki goes into it isnt exactly enormous : "You can add your own attributes and use them in the event sheet editor, but they do not have any built-in effect. "
Also what makes them different from familys? - which seem to have pretty much the same use apart from one is a tickbox and one isn't.
I'd have thought you'd edit the attribute in its own kindof global event sheet or something... I dunno.
The only place where they do show up is the expression editor bit which also shows all the global objects etc. (but nowhere else does)