Object type from which another object type (subtype) has inherited all object type components. Changes to the object type components of the supertype only affect the object type components of the subtype if the components have not been changed for the subtype.
----------------------分隔线上面是 SAP 标准文档中提供的说明
分隔线下面是我的翻译
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一个被其他对象类型(子类型)集成了所有对象类型组件的对象类型。修改超类型的对象类型组件只会影响到没有修改过这些组件类型的子类型。