From a design point of view, the facade also has the benefit of providing semantic meaning to the business process.
从视图层的设计角度，facade也有提供业务处理的语义的优点。
From a design point of view, it helps to concentrate on the role of XML documents, rather than on their structure.
从设计的观点来看，这有助于把焦点放在XML文档的角色上，而不是放在它们的结构上。
The reason for describing it as a separate scenario is because it is different from an application design point of view.
将其作为一种单独的场景进行描述的原因是，从应用程序设计的角度来看，它有所不同。
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