The purchase order processing service is specified by the Purchasing service specification (also shown in Figure 4) which includes the following capability (or operation)
定购单处理服务由 Purchasing 服务规范指定（请参见图4），该规范包括如下功能（或者操作）
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The purchase order processing service is specified by the Purchasing service interface (shown in Figure 4), which includes the following capability (or operation).
After it is deployed, other service consumers can bind to the purchasing service of the seller OrderProcessor component and invoke the service operation.