High Level Data Model 高阶资料模型
The high-level data model is a consistent definition of all of business subject areas and data elements common to the business, from a high-level business view to a generic logical data design.
高级数据模型是所有业务主题领域以及业务的公共数据元素的一致性定义，从高级的业务视图到通用的逻辑数据设计。
Why not just model the data as a document, which doesn't necessarily fit into a rigid relational model but roughly follows the semantics of a high-level model?
为什么不将数据建模为文档呢？这样可以不用死守严格的关系模式，而只需要大致遵循高级模式的语义。
Ganesh points out that "the" canonical data model is typically too high-level and abstract for the practical use.
Ganesh指出所谓规范的数据模型通常层次较高且对于实践应用来说过于抽象。
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