This made it extremely easy to persist the published records without the need to create the HL7 model in a traditional relational structure.
这使得持久化已发布的记录非常容易，并且不需要用传统的关系数据结构创建hl7模型。
Because of its regular structure, relational data is "dense" — that is, every row has a value in every column.
由于其规则结构，关系数据是“密集的”，即每一行中的每一列都有一个值。
It probably isn't enough to break a table down into rows and columns-the record structure of a relational table might not capture some useful groupings.
将一个表分解为一些行和列也许还不够—一个关系表的记录结构也许不能捕获一些有用的组合。
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