清单2展示了一个简短的php指令集，可以提取需要的数据。

Listing 2 shows a short, simplified set of instructions in PHP to extract the data required.

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对于方法调用指令，可以使用Bytecode Engineering Library (BCEL)类来提取方法声明抛出的已检查异常的类型。

For the method call instructions, you use Bytecode Engineering Library (BCEL) classes to extract the types of checked exceptions the method is declared to throw.

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您需要用查询语言来提取和使用来源于合作伙伴服务的工作流程数据(例如，生产指令中要生产的产品)。

You need the query language to extract and use workflow data coming from partner services (for example, items to be produced in a production order).

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