将弹出一个对话框，其中包含与该角色关联的业务对象中的所有属性。

This pops up a dialog of all the properties in the business object associated with the role.

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角色代表元数据，描述业务对象中的哪个属性与属于该关系的其他角色中描述的属性相关联。

The role represents metadata that describes which property in the business object is correlated to the properties described in the others roles that are part of the relationship.

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组合角色一个特殊情况是，业务对象只能通过将其键属性与父级的键属性进行组合来唯一标识。

A special case of a composite role is where a business object can only be uniquely identified when combining its key attribute with its parent's key attribute.

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