两个文件好像没有关联成功

<?xml version="1.0" encoding="UTF-8"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema">
 <element name="teaching-plan">
  <complexType>
   <sequence>
    <element name="course"  maxOccurs="2">
     <complexType>
      <sequence>
       <element name="course-name" type="string"></element>
       <element name="class-hour">
        <simpleType>
         <restriction base="integer">
          <minInclusive value="20"></minInclusive>
          <maxInclusive value="110"></maxInclusive>
         </restriction>
        </simpleType>
       </element>
       <element name="exam-form" type="string"></element>
      </sequence>    
     </complexType>
    </element>
   </sequence>
  </complexType>
 </element> 
</schema>

<?xml version="1.0" encoding="UTF-8"?>
<teaching-plan xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:noNamespaceSchemaLocation="plan.xsd">
  <crouse>
    <crouse-name>大学英语</crouse-name>
    <class-hour>36</class-hour>
    <exam-form>考试</exam-form>
  </crouse>
  <crouse>
    <crouse-name>高等数学</crouse-name>
    <class-hour>72</class-hour>
    <exam-form>考试</exam-form>
  </crouse>
  <crouse>
    <crouse-name>计算机基础与应用</crouse-name>
    <class-hour>2000</class-hour>
    <exam-form>上机操作</exam-form>
  </crouse>
</teaching-plan>

两个文件好像没有关联成功啊，如果成功的话3个course应该会报错啊，第三个course的class-hour设为2000肯定也会报错的啊