• 1. 中继类别: class of trunk | COT
• 2. 类别中继资料: class meta-data

• 1.使用这个方法覆写特定衍生类别的中继资料后，若再尝试覆写此相同衍生类别的中继资料，将会引发例外状况。
  After metadata for a particular derived class override is established with this method, subsequent attempts to override metadata on this same derived class will raise an exception.
  dict.yoduao.com
• 2.您可以在这个关联的类别中，提供该资料模型没有的其他中继资料资讯。
  In this associated class you provide additional metadata information that is not in the data model.
  dict.yoduao.com
• 3.中继资料 API 只会传回指定之类别的直接成员宣告，而且需要 API 用户端执行其他呼叫，以查核阶层架构和列举继承的方法。
  The metadata API returns only the direct member declarations for a given class and requires the API client to make additional calls to walk the hierarchy and enumerate inherited methods.
  dict.yoduao.com

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