Instead it simply creates the property for you — on that particular instance of the data object.

相反，它将直接为您创建该属性——在这个特定的数据对象实例上。

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You can use it to validate instance data from a business object.

您可以使用它从一个业务对象验证实例数据。

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The object can generate process instance specific data, such as process name, current activity, current logged in user, and the current instance ID.

该对象能生成进程实例特定数据，比如进程名称、当前活动、当前登录用户以及当前实例 ID。

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