DOCBOOK-APPS: Attributes for figures

Hi,

I maight be missing but looks like there is attribute sets for figures.
What I mean is I would like have a border around the figure so it is
easily distinguished ( nnot to say that it look better :-). Sİnce there
is no such thing How do I make the figures to have frame around them ?

Thanks
-- 

Togan Muftuoglu