One of the model files, known as the base model, represents the database before the change.

其中一个模型文件（称作基础模型） 表示更改之前的数据库。

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The second is an "object-centric" approach, which starts with a business model and creates a database to persist the model.

第二种是“以对象为中心”的方法，从业务模型和创建数据库来持久化这个模型开始。

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But a problem occurs when the analysis model is used to create a new database model, because the information captured in the analysis model is insufficient to complete a working data model.

但是当用分析模型创建新的数据库模型时就会出现问题，因为，从分析模型中得来的信息已经不足以完成工作数据模型了。

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Instead of trying to revamp JIMS with brand-new technology, Harris County has stuck to its grand-design architecture by migrating its legacy database to the more current Model 204 Database Management System, made by Computer Corporation of America, and rewriting Cobol applications in the Model 204 language.

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Using his proprietary model and database of historical trading situations, Way calculates probabilities of future price movements for individual securities.

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In contrast, a NoSQL database provides a more flexible data model, and it can be scaled across multiple machines.

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