The GREP definitions are all listed in a text frame (called the stylepainterframe) which resides on the pasteboard - this makes it easy to re-use and share the same GREP-based style list between multiple documents - simply copy the stylepainterframe between documents. You can list as many GREP expressions as you want in the style painter frame on the pasteboard, one GREP expression per paragraph, and you can apply different attributes to each and every one of these GREP expressions. StylePainter will work its way through your list of GREP expressions from top to bottom, and apply each GREP expression to the whole document in turn.
