Simple reference qualifier example Use simple reference qualifiers when you want to limit the values for a reference field based on other values in the referenced table or related tables. The base system provides several simple reference qualifiers by default. An example is the reference qualifier on the Vendor field on asset forms, such as the Hardware form. The qualifier restricts the companies you can select for this field to only those companies with the Vendor field set to true.Figure 1. Simple reference qualifier Note: Simple reference qualifiers can have a maximum of thirteen reference qualifier conditions.