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| <?xml version="1.0" encoding="UTF-8" ?>
<!-- 定义DTD校验规则 -->
<!DOCTYPE class [
<!-- 定义class至少包含一个student -->
<!ELEMENT class (student+)>
<!-- 定义student只包含name,age,sex,className属性 -->
<!ELEMENT student (name, age, sex, className)>
<!-- 定义id属性, 属性默认值为0 -->
<!ATTLIST student id CDATA "0">
<!ELEMENT name (#PCDATA)>
<!ELEMENT age (#PCDATA)>
<!ELEMENT sex (#PCDATA)>
<!ELEMENT className (#PCDATA)>
]>
<class>
<student id="1">
<name>sungm</name>
<age>25</age>
<sex>Man</sex>
<className>Class One</className>
</student>
<student id="2">
<name>sunhw</name>
<age>1</age>
<sex>Man</sex>
<className>Class Two</className>
</student>
</class>
|