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贴子主题：请那位大哥大姐帮忙　！！！！！！！！！

本主题类别:

我写了一个dtd,但出错了，　我不知道错在那了，请那为哪位大哥帮忙
good.dtd
<?xml version="1.0" encoding="gb2312"?>
<!ELEMENT studentgram (student)>
<!ELEMENT student (name,age,sex,research,address?,(worktelephone|livetelephone),lian)>
<!ELEMENT name (#PCDATA)>
<!ELEMENT age (#PCDATA)>
<!ELEMENT sex (#PCDATA)>
<!ATTLIST sex kind (male|female) "male">
<!ELEMENT research (#PCDATA)>
<!ATTLIST research kind (yes|no) "yes">
<!ELEMENT address (#PCDATA)>
<!ELEMENT worktelephone (#PCDATA)>
<!ELEMENT livetelephone (#PCDATA)>
<!ELEMENT lian (#PCDATA)>
<!ATTLIST lian xmlns:xlink CDATA #FIXED "http://www.w3.org/1999/xlink"
xlink:type (simple) #FIXED "simple"
xlink:href CDATA #REQUIRED
xlink:role CDATA #IMPLIED
xlink:title CDATA #IMPLIED
xlink:show (embed|replace|new) "replace"
xlink:actuate (onLoad|onRequest) "onRequest">

bad.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE studentgram SYSTEM "good.dtd">
<studentgram>
<student>
<name>zhangsan</name>
<age>16</age>
<sex>male</sex>
<research>true</research>
<address>china</address>
<worktelephone>2286100</worktelephone>
<lian xlink:href="http://www.lzu.edu.cn">lanzhoudaxue</lian>
</student>
</studentgram>

错误是：

到未声明的名称空间前缀: 'xlink'的引用。处理资源 'file:///C:/Documents and Settings/q/My Documents/tmp0000.xml' 时出错。第 11 行，位置: 42

<lian xlink:href="http://www.lzu.edu.cn">lanzhoudaxue</lian>
-----------------------------------------^


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