Changing colors of features based on attribute

[Valentin Sanchez]

Hi,

I would like to change the color of a feature according to an attribute.
But the value is not in the shapefile. It is stored in a different dbf.

Can I use JOIN and EXPRESSION to do it?

I have use this to change the color according to an attribute:

CLASS
    COLOR 0 255 0
    SYMBOL 0
    EXPRESSION "Madrid"
    NAME "Pepito Madrid"
   END