在这个意义上，只引用模式并且不添加新的声明的XML消息是XML实例文档。

XML messages that only reference a schema and do not add new declarations are XML instance documents in this sense.

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当您添加新行时，可以引用下面的值。

Please refer the values below when adding a new row.

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在添加模拟器时(如图3所示)，新的模拟器向导将询问您是否要模拟引用或组件。

When you add an emulator yourself, as you saw in Figure 3, the New emulator wizard asks you whether you want to emulate a reference or a component.

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