They also include object concepts and the capabilities to extend the database server capabilities to better fit your business model.
它们还包含了对象的概念，并且可以扩展数据库服务器的功能，更好地配合您的业务模型。
They capture the core data model from the database and also the business rules that apply to this data.
它们从数据库捕获核心数据模型以及应用于这些数据的业务规则。
Once the business model has been deleted from RAM, the application reloads it from the database.
一旦业务模型在RAM中被删除，程序就会从数据库中重新加载出来。
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