For this, the type system from XML Schemas was used and augmented with a bit of extra syntax and semantics. You can provide a data type by using the as attribute-for instance.

为此使用了XML架构的类型系统，并附加了一些额外的语法和寓意。

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The second set of methods is the "mutator" methods, they create a new query() object with the relevant (internal)attribute either augmented or replaced.

第二组的方法是“突变”方法，他们创建一个新的查询（）对象与相关（内部的）属性增强或取代。

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