From a transformation point of view, this service specification maps to a WSDL port type, which at this time is an uninteresting port type because it has no operations or messages so far.
以转换的观点，此服务规范映射到WSDL端口类型，此时这是一个无趣的端口，因为到目前为止还没有操作或消息。
This makes it hard to work with large schemas where the source and target fields of an intended transformation are not always in view with each other at the same time.
这样的话，如果要执行的转换的源和目标字段不能同时显示在视图中，那么将很难处理这种大型模式。
This makes it hard to work with large schemas where the source and target fields of an intended transformation are not always in view with each other at the same time.
这样的话，如果要执行的转换的源和目标字段不能同时显示在视图中，那么将很难处理这种大型模式。
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