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.
That works with a definition query, but not with quantity symbol classification using exclusions. For now, I populated all <null> values in [qualifier] with a "-" but in a table that looks like it means something. <null> indicates that the [result] is valid, so if there's anything in the [qualifier] field, that is a flag that alerts the user to a potential problem with the result.
Is there an environment setting to handle null values this way? If not, can ESRI make this available soon? There are many other instances where this has been a problem for me.