尽管人们可以继续商讨对xml语法来说哪种数据模型最好，但我认为没有多少意义，因为各种基于对象的API其优点和不足基本上是一样的。
While one can deliberate forever the best data model for the XML syntax, I believe it completely misses the point because every object-based API shares the same basic pros and cons.
用基于 SQL 的模式可以把数据呈现从对象模型映射到关系数据模型，对象关系映射引用了这项技术。
Object relational mapping refers to the technique of mapping the data representation from an object model to a relational data model with a SQL-based schema.
一个基于XML的公共数据模型(称为NIEM核心)，提供描述人员、地址、活动和组织等通用对象的数据组件。
A common XML-based data model called NIEM core that provides data components for describing universal objects such as people, locations, activities, and organizations.
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