关联谓词通常将事件中的某个键值(例如唯一旅行标识符)与包含相同键的度量作比较。

Correlation predicates typically compare some key value in the event, such as a unique trip identifier, with a metric containing the same key.

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在一个真实的实现中，每个事件都将包含某种类型的病人标识符，用于从一个外部数据源查找医生的电子邮件地址。

In a real implementation, each event would include some type of patient identifier that would be used to find the doctor's E-mail address from an external data source.

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参数指定评论的日期、故事标识符、事件标识符以及输入该评论的用户。

The parameters specify the date of the comment, the story identifier, the identifier of the event, and the user who entered the comment.

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