You can write separate code that loads the relevant EMF resources and invokes the mapping engine on the model objects, but in this example everything is done for you in a transparent way.
你可以分开编写加载相关的EMF资源和对模型对象调用映射引擎的代码，但是在这个例子中所有任务的完成都是透明的。
This model defines a collection of classes for holding the state, and the engine manages the life cycle of these information objects.
该模型定义一组用于存放状态的类，而引擎管理这些信息对象的生命周期。
The three model forms most useful in this context are a structure model of the rule groups, a dependency map among groups, and the execution flows that the rule engine itself performs.
在这种上下文中，最有用的三种模型是规则组的结构模型、组间的依赖关系图，以及规则引擎本身执行的执行流。
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