follow the title, e.g
1. only want to select the shapes with : model height > 10.
2. select the shapes with parameter shapeCreation = true && area > 20 ...
newbie,need details. thanks in advance!
For #1: In your rule, when the condition model height > 10 is true then extrude the building to an abnormally high height like 300, or color is a certain color. Just "flag" the error using the rule.
For #2: Learn python for CE.