The Visitor design pattern is used to separate the exception hierarchy from the code that builds the fault details.

Visitor设计模式用于把异常层次与构建故障详细信息的代码分开。

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Another design pattern that lends itself well to DEBA is the Visitor pattern, which externalizes an operation that will be performed on another object, a group of objects, or a structure of objects.

另外一种可用于DEBA架构的设计模式是Visitor(访问者)模式，将操作外部化，可以对其他对象、对象组或者对象结构执行这些操作。

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