[MapServer-users] LAYER expression nested in a CLASS with expression

[Trygve Aspenes via MapServer-users]

I have a layer with a class consisting of a symbol and potential a label 
like this:

       CLASS
            NAME "   TEST_NAME"
            EXPRESSION ([var1]>=8 and [var1]<13)
            STYLE
                SYMBOL "SYMBOL1"
                COLOR 0 255 0
            END
            LABEL
                EXPRESSION ('%showlabel%' eq 'ON')
                TEXT ([labelvalue])
                FONT "dejavusans"
                TYPE truetype
                SIZE 7
                COLOR 0 255 0
                POSITION UR
            END
        END
What I want is to plot symbol symbol1 when var1 is between 8 and 13. And 
if the SHOWLABEL parameter from the request url is set to ON also plot 
the label labelvalue. This symbol1 is plotted, but the label is not 
plottet whether the showlabel is set to ON or not. No error message from 
mapserver.

So I guess the expression in the LABEL is silently ignored.

I can make two classes, one without the label and one with the label. 
And make one expression handeling the showlabel which class to use. But 
I have hoped to avoid that as I have quite many classes.

Any ideas if this is possible to achive?

Trygve Aspenes
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