pt1
pt1-
That means that the service provides ( or publishes ) a portType ( PT1 ) and the process invokes an operation of that portType .
这意味着服务提供了（或发布了）一个portType（PT1），然后流程调用该portType的操作。
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Thus , from the point of view of the process , the process requires the portType PT1 from the service and provides the portType PT2 to the service .
这样，从流程的角度看，流程需要来自服务的portTypePT1并提供portTypePT2给服务。