Sorry, I'm replying to myself just to complement since there is no 'edit message' at this board.
My environment is:
+ MyFaces 1.1.5
I've also checked this with latest nightly (3.0.1) and it's still true. Please let me know if I should open a JIRA issue / feature request.
And... yes! I've had no joy with finding the answer in doc, forum, Google & Co. :)
The problem is solved! It was mistake of mine, however the property rows (which accepts EL binding) is not documented.
Since the static value provided to elements seems to override rows, the question is: what is the difference between this two property and how they are intended to be used correctly? The second one: should I post this to JIRA as documentation issue?