What must you do before you can use a new attribute domain to validate attribute values?

To use a new attribute domain for validating attribute values, it is essential to apply the domain to a specific attribute field in the feature class. This step is crucial because the attribute domain defines permissible values or ranges for a particular field, ensuring data integrity and consistency. By applying the domain through the Feature Class Properties dialog box, you link the defined rules of the domain directly to a specific attribute, enabling the system to validate entries against these predefined constraints when users input data.

Each domain is inherently tied to a specific field within the feature class. Until the domain is applied to the appropriate attribute field, the validation process cannot take place since the system will have no reference for what values are acceptable. Thus, setting this up properly is a foundational step in GIS data management, ensuring that data adheres to established parameters during data entry or updates.