Message in Chinese (Simplified) (中文(简体))
多重性与关系“<var>Y</var>”中 Role“<var>X</var>”中的引用约束冲突。因为 Dependent Role 中的所有属性都不可以为 null，Principal Role的多重性必须为“1”。
Unlocalized message
Multiplicity conflicts with the referential constraint in Role '<var>X</var>' in relationship '<var>Y</var>'. Because all of the properties in the Dependent Role are non-nullable, multiplicity of the Principal Role must be '1'.
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