<?xml version="1.0" encoding="UTF-8"?>

<schema xmlns="http://www.w3.org/2001/XMLSchema">

<element name="teaching-plan">

<complexType><!--复杂节点，包含子节点必须利用这个标签-->

<sequence>

<element name="course" minOccurs="1" maxOccurs="100">

<complexType>

<sequence>

<element name="course-name" type="string"></element>

<element name="class-hour">

<simpleType>

<restriction base="integer">

<minExclusive value="20"></minExclusive>

<maxExclusive value="110"></maxExclusive>

</restriction>

</simpleType>

</element>

<element name="exam-from" type="string"></element>

</sequence>

<attribute name="no" type="string" use="required"></attribute>

</complexType>

</element>

</sequence>

</complexType>

</element>

</schema>

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE teaching-plan SYSTEM "node.dtd">

<teaching-plan xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="plan.xsd">

<course no="001">

<course-name>大学英语</course-name>

<class-hour>36</class-hour>

<exam-form>考试</exam-form>

</course>

<course no="002">

<course-name>高等数学</course-name>

<class-hour>805</class-hour>

<exam-form>考试</exam-form>

</course>

<course no="003">

<course-name>计算机应用基础</course-name>

<class-hour>108</class-hour>

<exam-form>上级考试</exam-form>

</course>

</teaching-plan>