为什么会报错Element teaching-plan must be declared

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


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

<teaching-plan>

<course id="o1">
<course-name>大学英语</course-name>
<class-hour>36</class-hour>
<exam-form>考试</exam-form>
</course>
<course id="o2">
<course-name>高等数学</course-name>
<class-hour>70</class-hour>
<exam-form>考试</exam-form>
</course>
<course id="o3">
<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>

//XSD语言

<?xml version="1.0" encoding="UTF-8"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema">
<element name="teacher-plan" >
<complexType>
<sequence>
<element name="course" minOccurs="0" maxOccurs="100">

<complexType>

<sequence>

<element name="course-name" type="string"/>
<element name="class-hour">
<simpleType>
<restriction base="integer">
<minInclusive value="20"/>
<maxInclusive value="110"/>
</restriction>
</simpleType>
</element>
<element name="exam-form" type="string"/>

</sequence>
<attribute name="id" type="string" use="required"/>
</complexType>
</element>

</sequence>
</complexType>
</element>

</schema>

Daisy3924553 2019-01-18

源自：XML入门 2-7 自由编程

收起

2回答

chrismorgen 回答被采纳获得+3积分 2019-01-18 13:37:16

你好同学，如下图所示标记的单词应改为teaching-plan，祝学习愉快~

收起回答

Daisy3924553 提问者 #1

老师您好，改了还是报错。

2019-01-18 14:14:45

chrismorgen 2019-01-18 16:12:49

你好同学，teaching-plan标签重复了，并且下图标记的/代表当前的标签是结束的，

修订之后的xml代码如下：

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


<!--<!DOCTYPE teaching-plan SYSTEM "Plan.dtd"> -->
<teaching-plan xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:noNamespaceSchemaLocation="plan.xsd">
    <course id="o1">
        <course-name>大学英语</course-name>
        <class-hour>36</class-hour>
        <exam-form>考试</exam-form>
    </course>
    <course id="o2">
        <course-name>高等数学</course-name>
        <class-hour>70</class-hour>
        <exam-form>考试</exam-form>
    </course>
    <course id="o3">
        <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>

修订之后的xsd代码如下，祝学习愉快~

<?xml version="1.0" encoding="UTF-8"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema">
   <element name="teaching-plan" >
       <complexType>
           <sequence>
               <element name="course" minOccurs="0" maxOccurs="100">

                   <complexType>

                       <sequence>

                           <element name="course-name" type="string"/>
                           <element name="class-hour">
                               <simpleType>
                                   <restriction base="integer">
                                       <minInclusive value="20"/>
                                       <maxInclusive value="110"/>
                                   </restriction>
                               </simpleType>
                           </element>
                           <element name="exam-form" type="string"/>

                       </sequence>
                       <attribute name="id" type="string" use="required"/>
                   </complexType>
               </element>

           </sequence>
       </complexType>
   </element>


</schema>

收起回答

提问者 Daisy3924553 #1

老师您好。我复制粘贴了你的代码。错误更多了。主要错误提示是Element teaching-plan must be declared和Cannot resolve symbol 'course'

2019-01-18 16:30:39
chrismorgen 回复提问者 Daisy3924553 #2

同学使用的是idea吧？如果是，建议参考一下这个问答，http://class.imooc.com/course/qadetail/73156，如果有不明白的地方可以继续提问哦，祝学习愉快~

2019-01-18 16:42:28
提问者 Daisy3924553 回复 chrismorgen #3

好的，谢谢老师，辛苦了。

2019-01-18 19:15:53