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ENTITY non_optional_constraint SUBTYPE OF (attribute_value_constraint); END_ENTITY; -- non_optional_constraint  | 
Entity data types and their attributesconstraint- constraint_attribute - attribute_value_constraint attribute: attribute_value_constraint_select; non_optional_constraint -  | 
Global rules for this entity data type- | 
public interface ENon_optional_constraint extends EAttribute_value_constraint | 
public class CNon_optional_constraint implements ENon_optional_constraint | 
public class ANon_optional_constraint extends AEntitypublic ENon_optional_constraint getByIndex(int index)public ENon_optional_constraint getCurrentMember(SdaiIterator it)  |