Why don't I see a custom DCL field for a standard sales object in the subject area for that object?

You must create a custom subject area to report on dynamic choice list (DCL) fields you create for standard objects in Oracle Transactional Business Intelligence (OTBI). You can then create a union analysis that joins the prebuilt subject area with your new custom subject area. Custom DCL fields don't show up in the prebuilt subject areas for standard objects.