exactly_one
INSTANCE exactly_one#1;
extracted_from = {defined_type#23};
choice_set = ?list;
constrainee = explicit_attribute#101;
END_INSTANCE;
INSTANCE exactly_one#2;
extracted_from = {oneof_expression#6};
choice_set = ?set;
constrainee = entity_type#42;
END_INSTANCE;
INSTANCE exactly_one#3;
extracted_from = {defined_type#24};
choice_set = ?set;
constrainee = explicit_attribute#102;
END_INSTANCE;
INSTANCE exactly_one#4;
extracted_from = {oneof_expression#8};
conjunct_of = conjunction#4;
choice_set = {entity_type#44, entity_type#45};
constrainee = entity_type#47;
END_INSTANCE;