If an event contains an attribute that is not described in the meta data, RFIDIC still captures this event, but considers this attribute a surprise attribute.

如果一个事件包含元数据中未描述的属性，那么RFIDIC仍然会捕捉这个事件，但是将这个属性当作意外属性。

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The Event catalog is a repository of event meta-data and provides the user with the ability to specify event definitions.

事件目录是事件元数据的存储库，它为用户提供指定事件定义的能力。

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Remember that the MidiOut client has only subscribed to MIDI short messages and a special closing event so we can ignore other MIDI events such as Meta or System-Exclusive.

记住 MidiOut 客户端只订阅了 MIDI 短消息和特别的结束事件，因此可以忽略其他的 MIDI 事件，例如 Meta 或者 System-Exclusive。

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