因为我们在模型中将事件表示为几种特定类型的业务项，所以我们可以为事件定义一些属性，用来捕获关于它们承载的信息的详情。

Because we model events as specific kinds of business items, we can define attributes for them to capture in more detail what information they carry.

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一个部分称为EventInfo，描述静态事件信息的类型，另一个部分称为TradeOutArray，描述动态业务有效负载的类型。

One part, called EventInfo, describes the type of the static event information and another part, called TradeOutArray, describes the type of the dynamic business payload.

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