I never tried this but i'm pretty sure this is not legal.
If you need to insert dynamical values into tiles attributs, I would suggest you to deal with it right into the JSP using your tiles component.
BTW, why do you need this into the XML definition file ?
Joined: Feb 15, 2002
The idea of tile-defs was to provide a means of by-passing creating any jsp page (with the exception the xxxLayout.jsp). The validation framework supports talking with the applicationResources.properties so it would seem logical to me that the tile-defs should have similar support.
My question then is, how can I use tile-defs and not hard code text into the tile-def for things like page titles. If there is no way to do this, then I'll put this info in the xxxLayout.jsp page.