CLASSITEM and EXPRESSION for a float field

[Luca Manganelli]

Hi, I'm attempting to use the EXPRESSION for a float field, but I
don't know the right manner.

I.e.:

LAYER
    NAME 'test'
    ...
    CLASSITEM 'floatfield'
    ....
    CLASS
            NAME "testclass1"
            EXPRESSION '9'
            ...
    END
END

my mapserver doesn't view the objects with EXPRESSION '9', so I
suspect that the '9' is not right (I tried with '9.0', too).

Any idea?