keep null values with data exclusion

Discussion created by jamesh on Apr 18, 2012
Latest reply on Apr 19, 2012 by jamesh

I'm classifying point symbols based on a numeric field [result]. I want to exclude and display differently any data that has a "U" in a separate field [qualifier], this can be done with the 'data exclusion' feature, but all null values will be discarded. A null [qualifier] means the [result] is valid, and shall be displayed based on the quantity classification. Is there a way to include null values without editing the field or copying the layer & reclassifying? It makes no sense to me why null values must be eliminated.