<?xml version="1.0" encoding="utf-8"?>
<books xmlns:subject="http://www.itzcn.com/xmlns-booksubjectM " xmlns:content="urn:xml一book:bookcontent">
    <subject:book bookname="Oracle DBA快速入门">
        <subject:description>
            从零基础开始学习Oracle DBA知识，30天可以系统掌握DBA 知识
        </subject:description>
    </subject:book>

    <content:book bookname="XML基础教程">
        <content:description〉讲述XML基本知识的入门级教程〈/content:description〉
        <content:page>460pages</content:page>
    </content:book>
</books>

------解决方案--------------------
探讨


左右括号都有写得错，给你个更改好的，直接赋值粘贴进去举行了：
XML code
<?xml version="1.0" encoding="utf-8"?>
<books xmlns:subject="http://www.itzcn.com/xmlns-booksubjectM " xmlns:content="urn:xml一book:bookcontent">
    <subject……