If the project needs change, which must be revised before the definition of XML documents, then attendant is that you must find the code parsing XML where each of its changes.

• 如果项目需求发生变化，不得不修改之前所定义的XML文档，那么，随之带来的是您必须查找代码中解析XML的地方，对其进行逐一的更改。