与资源模型定义文件一样，这些数据文件同样是JSON文件，并包含将加载到模型中的对象。
These data files are again JSON files, like the Resource model definition files, and they contain objects to be loaded into the model.
它读取像样本那样的Prolog数据文件，然后创建Python对象来对Prolog声明建模。
It reads a Prolog data file like the sample, then creates Python objects to model the Prolog declarations.
框架查询两个元数据源：活动记录模型和每个模型对象的定制元数据文件。
The framework queries two sources of metadata: the Active Record model and a custom metadata file for each model object.
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