In the case of page actions, the XML is desirable since view IDs are volatile to change.

对于页面动作，XML是有必要的，因为视图ID非常容易变化。

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TheXMLModel view gives you a preview of your XML data model, which includes the data instance, bindings (fields that you have bound to), and submissions (submission rules and actions).

xmlmodel视图提供XML数据模型的预览，包括数据实例、绑定(已经绑定的字段)和提交(提交规则和操作)。

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