Create an If refinement from the source celsiusTemperature element, which targets the advisory element on the output.

从源celsiustemperature元素中创建If细分，这将针对输出中的advisory元素。

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The Assign refinement is used when you want to assign a constant value to a target element or attribute.

希望将常量值指定给目标元素或属性时，就要使用 Assign 细化。

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Add and Else refinement to the If refinement and target the advisory element on the output.

向If细分添加and Else细分并针对输出中的advisory元素。

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