在宏观层次上，是生产力的主要载体。
On the macro level, it is the main carrier of productive forces.
宏观层次就是构建和应用范围，而微观层次处于领域层，领域类在与数据库发生交互时发布事件。
The macro level is build and application wide and the micro level happens at the domain layer, where domain classes publish the events whenever they interact with the database.
主题类型定义主题内部的信息体系结构（在微观层次上），而映射类型定义跨越主题的信息体系结构（宏观层次上）。
The topic type defines the information architecture within topics (the micro level) while the map type defines the information architecture across topics (the macro level).
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