逻辑模型表达了信息的业务视图。
The logical model expresses the business view of information.
有时候，概念数据建模期间表达的关系（特别是多对多关系）在逻辑模型中被显示为实体本身。
Sometimes, relationships expressed during conceptual data modeling (in particular many-to-many relationships) are shown in the logical model as entities themselves.
服务分析模型中表达的结构是概念模型(或没有概念模型情况下的逻辑数据模型)中的结构的直接反映。
The structures expressed within the service analysis model are a direct reflection of those within the conceptual model (or logical data model where no conceptual model formally exists).
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