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1·The input to the operation is a purchase order document, and the output is a response designating that the purchase order has been received and validated.

操作的输入是购买定单文档，输出是表明购买定单已被接收到并已验证的响应。

2·Next, Company B invokes a Web service on Company A and sends the purchase order confirmation as a request, and receives a receipt acknowledging the purchase order confirmation as the response.

随后，公司 B 针对公司 A 调用一个 Web 服务，处理完后公司 B 发送订购单确认作为对公司 A 的请求，然后公司 A 将发送订购单确认已收到作为对公司 B 的响应。

3·Purchase to stock-the demand response method where an end item or service part required for an expected customer order is purchased and stocked against a forecast.

根据预测采购并储存预期客户订单所需最终产品部件或服务部分的需求回应方式。