一般而言，XML查询表达式的结果可由异构的元素序列、属性和所有混合类型的原始值构成。
In general, the result of an expression in an XML query may consist of a heterogeneous sequence of elements, attributes, and primitive values, all of mixed type.
一般而言，XML查询表达式的结果可由异构的元素序列、属性和所有混合类型的原始值构成。
In general, the result of an expression in an XML query may consist of a heterogeneous sequence of elements, attributes, and primitive values, all of mixed type.
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