从设计的观点来看，这有助于把焦点放在XML文档的角色上，而不是放在它们的结构上。
From a design point of view, it helps to concentrate on the role of XML documents, rather than on their structure.
在数据库的设计上面，根据系统的需要，设计了角色表、用户表、部门表、文档表、员工表、短信表。
In the database design above, according to the needs, I design role table, users table, document table, department table, message table, employ table.
在数据库的设计上面，根据系统的需要，设计了角色表、用户表、部门表、文档表、员工表、短信表。
In the database design above, according to the needs, I design role table, users table, document table, department table, message table, employ table.
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