If the part element has a type attribute, then you can tell directly whether the type is simple (for example, XSD: int, XSD: string, etc.) or complex.
如果这个部分元素具有一个类型属性，那么您就可以直接看出这个类型是简单的(例如，xsd：int、xsd：string，等等)还是复杂的。
The part element library was constructed by object-oriented method and could be extended without changing the system structure.
采用面向对象的方法构建部件单元库，能在不改变系统结构的条件下对部件单元库进行扩充。
The part element library was constructed by object-oriented method and could be extended without changing the system structure.
采用面向对象的方法构建部件单元库，能在不改变系统结构的条件下对部件单元库进行扩充。
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