SCHEMA Class_arm;
ENTITY Class
SUPERTYPE OF
(ONEOF (Class_by_extension,
Class_by_intension));
id : STRING;
name : STRING;
description :
OPTIONAL
STRING;
END_ENTITY;
ENTITY Class_by_extension
SUBTYPE OF (Class);
END_ENTITY;
ENTITY Class_by_intension
SUBTYPE OF (Class);
END_ENTITY;
END_SCHEMA; -- Class_arm