从清单8可以看到，在根据生产产品的类型处理每个产品前，您仅需要一个标记来作出条件决策。

You can see from Listing 8 that you just need an tag to make conditional decisions before processing each production item according to its type.

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JSTL为条件及循环结构提供了标记。

JSTL provides tags for conditional and looping constructs.

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未连接的输入应被放入某个单独的输入条件，或是标记为可选，即把它们的最小增殖次数设置为零，以允许执行流程。

The disconnected inputs must be either put into a separate input criterion or marked as optional by setting their minimum multiplicity to zero to allow the process to execute.

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