摘要： 针对XML文档访问控制过程中，更新操作引起的重复DTD验证以及DOM树解析、标记问题，提出操作类型的概念。根据操作类型区分不同的更新访问请求，过滤掉不具权限的请求，以节省验证以及标记过程所耗费的内存等系统资源。通过实例证明该方法在更新请求频繁的情况下，性能优于现有的访问控制技术。

关键词: XML文档, 访问控制, 更新操作

Abstract: To solve the problem focuments of repetitive labeling process and Document Type Definition(DTD) verification process executed by the eXtensible Markup Language(XML) access control system for update operators, action type is defined. Using these action types, user queries are distinguished semantically and unnecessary queries are filtered out at the early stage, so memory and other system resources used in Document Object Model(DOM)-based DTD verification process and labeling process can be saved. The proposed access control technique shows better performance in an environment where update queries occur frequently after compared with existing one.

Key words: eXtensible Markup Language(XML) documents, access control, update operations

中图分类号: 

• TP391