In addition to the default role, each cube has a default policy.
除了默认角色，每个多维数据集还有一个默认策略。
A role that is allowed to access a cube is allowed to access all the members of a dimension by default.
默认情况下，如果角色有权访问一个多维数据集，那么它也有权访问一个维度的所有成员。
Together, the default role and default policy make up the default authorization: the implicit rule of access on the cube for users with no explicit rule of access.
默认角色和默认策略共同构成默认授权：多维数据集上针对没有显式访问规则的用户的隐式访问规则。
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