xml 入门 shema_01

shema基础：

shema的使用：

shema的属性和语法：

相应的源码：

1.shema的格式：

<?xml version="1.0" encoding="UTF-8"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema" 
        targetNamespace="http://www.example.org/02" 
        xmlns:tns="http://www.example.org/02" 
        elementFormDefault="qualified">
        
        <element name="books">
            <complexType>
                <sequence maxOccurs="unbounded">
                    <element name="book">
                        <complexType>
                            <sequence>
                                <element name="title" type="string"></element>
                                <element name="content" type="string"></element>
                                <choice>
                                    <element name="author" type="string"></element>
                                    <element name="authors">
                                        <complexType>
                                            <sequence maxOccurs="3">
                                                <element name="author" type="string"></element>
                                            </sequence>
                                        </complexType>
                                    </element>
                                </choice>
                            </sequence>
                            <attribute name="id" type="int" use="required"/>
                        </complexType>
                    </element>
                </sequence>
            </complexType>
        </element>
        
</schema>

<?xml version="1.0" encoding="UTF-8"?>
<books xmlns="http://www.example.org/02"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://www.example.org/02">
      
      <book id="1">
        <title>think in java</title>
        <content>hello java world</content>
        <author>zizhu</author>
      </book>
      
      <book id="2">
        <title>think in java (4 edition)</title>
        <content>base java</content>
        <authors>
            <author>bruce</author>
            <author>mike</author>
        </authors>
      </book>
      
</books>