If you keep your extended model information outside the actual grid's model, the row you modified in the grid model may not be the row you think it is in your data outside the grid.
如果将所扩展的模型信息保留在实际的网格模型之外，那么在网格模型内修改的行放到网格之外的数据中时很可能不会如预期的那样。
This Business Object Model (BOM) is extended within RSA/M with additional data requirements and business rules, resulting in a complete analysis model of the service candidates.
业务对象模型（Business Object Model，BOM）在 RSA/M 中由附加的数据需求和业务规则来扩展，形成了服务候选的完整分析模型。
NHMDB is a multimedia database system based on the extended relational data model and has the characteristics of object-oriented databases.
NHMDB是基于扩充关系数据模型的多媒介数据库系统，它以扩充关系为基础支持面向对象的主要特性。
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