teaching-plan行报错

<?xml version="1.0" encoding="UTF-8"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema" >
             <element name="hr">
                  <complexType>
                        <sequence>
                              <element name="course" minOccurs="1" maxOccurs="999">
                                    <complexType>
                                          <sequence>
                                                <element name="course-name"  type="string"></element>
                                                <element name="class-hour"  type="integer"></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="http://www.w3.org/2001/XMLSchema-instance"
xsi : noNamespaceSchemaLocation="hr.xsd">
    <course>
            <course-name>大学英语</course-name>
            <class-hour>36</class-hour>
            <exam-form>考试</exam-form>   
    </course>

    <course>
            <course-name>高等数学</course-name>
            <class-hour>70</class-hour>
            <exam-form>考试</exam-form>   
    </course>

    <course>
            <course-name>计算机应用基础</course-name>
            <class-hour>108</class-hour>
            <exam-form>上机考试</exam-form>   
    </course>
</teaching-plan>


我的为什么<teaching-plan xmlns="http://www.w3.org/2001/XMLSchema-instance"
xsi : noNamespaceSchemaLocation="hr.xsd">这一行一直报错