您只需要通过获取原始规则(清单2)的XML和使用文本编辑器修改表达式就可以完成这项工作。

You can do this simply by taking the XML of the original rule (Listing 2) and using a text editor to modify the expression.

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由查询表达式计算出来的XML“值”，可为零项、一项或者多项，而其中每一项可以是一个元素、一个属性或一个原始值。

An XML "value," computed by a query expression, may consist of zero, one, or many items, each of which may be an element, an attribute, or a primitive value.

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EcmaScript 组件只提供核心语言功能 -- 原始数据类型、表达式赋值和流量控制等等。

The EcmaScript component offers only the core language features -- the primitive data types, expression evaluation, flow control, etc.

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