If the work stream ID alias is already allocated to a policy set, the request might achieve a local cache hit.
如果工作流id别名已经分配给了策略集合，请求可能会得到本地缓存的回绝。
Work items tagged with a work stream identifier are resolved using the work stream id in the same way as a named policy set.
以一个工作流标识符标记的工作条目，使用与命名策略集合相同的方式用工作流id分解。
A context id (for example, customer id) uniquely identifies a common set of events flowing through a stream.
上下文id(例如，客户ID)唯一地标识流经某个流的一组公共事件。
A context id (for example, customer id) uniquely identifies a common set of events flowing through a stream.
上下文id(例如，客户ID)唯一地标识流经某个流的一组公共事件。
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