1·If there is no target attribute, then you use a custom callout transform, to initialize values.
如果不存在目标属性，则您将使用自定义调出转换来初始化值。
2·The dispatch system is implemented here as a callout node.
分派系统在此处是作为调出节点实现的。
3·If there's a logical single invocation within the mediation flow, it's sensible to use the callout node within the request flow, and then use the response flow for any additional mediation processing.
如果中介流中存在逻辑上的单一调用，则应合理使用请求流中的调出节点，然后将响应流用于任何其他中介处理。
4·If you want to experiment with this example a bit more, you can add an XSL Transformation mediation primitive before the callout node for the MQ import.
如果您要用此示例做进一步试验，可以在MQ导入的调出节点之前添加xsl Transformation中介元素。