An Enumeration Constraint is assigned to the Characterization Classes and enumerates the possible Values (within the Property's Value Lists) of a Property in the context of this Characterization Class.
Example:
Property PRO123 has a Value List VLI123 that contains the Values [VAL001; VAL002, VAL003; VAL004].
By applying Enumeration Constraint EC001 to Class CCL001 only the following Values are valid for PRO123: [VAL001; VAL002, VAL003]
By applying Enumeration Constraint EC002 to Class CCL002 only the following Values are valid for PRO123: [VAL001; VAL002]
By applying Enumeration Constraint EC003 to Class CCL003 only the following Value is valid for PRO123: [VAL004]