摘要
XQuery是XML查询语言的推荐标准。正如其它数据查询语言一样,XQuery也有自己的更新操作,XQuery更新操作就是用插入、替换、删除等操作对XML文档树进行修改,本文依照W3C组织7月草案[1]对XQuery更新操作提出了一些新的想法。诸如:对上述操作进行完善,使之更易读写,还设想了一个update操作符用来进行集中式更新操作,可以提高执行效率。当然这些都符合草案关于XQuery更新操作的规范[2]。
XQuery is the recommended standard for XML Query. Just like other queries, XQuery has its own update operators which will produce a copy of an XML tree in which some subtrees will be inserted, replaced or deleted. This paper presents some new thoughts for XQuery update according to W3C＇s drafts in June. These operators are perfected to be read and write easily. There is a ＂update＂ operator for centralized update, this operator can improve the efficiency. Of course all are according to the update specification in the draft.
出处
《微处理机》
2008年第4期113-115,共3页
Microprocessors
