The CRM package represents the design of a Customer Relationship Management service data model that can be reused in a number of services, even services provided by different organizations.
crm包代表了客户关系管理服务数据模型的设计，该模型在一系列的服务中可以得到重复使用，以及不太组织提供的服务。
From a design perspective, this is a classic problem of the data model being coupled to view generation.
从设计的角度来看，这是数据模型与视图生成耦合的经典问题。
The general design objectives of the logical data model are correctness, consistency, non-redundancy and simplicity.
逻辑数据模型的一般设计目标是正确性、一致性、非冗余和简单性。
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