还要使用数据类型和断言进行验证。
You should validate using data types and assertions as well.
在使用简单内容定义复杂类型时,可以指定两种类型的断言。
When defining a complex type with simple content, you can specify two types of assertions.
对于同一断言类型,在更具体的目标中设置的策略可以覆盖在高级目标中定义的策略。
Policies defined at high order targets can be overridden by policies set at a more specific target for the same assertion type.
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