41 lines
1.5 KiB
XML
41 lines
1.5 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!--
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schema约束文件的根标签必须是schema
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目标命名空间:类似java中的包名,用来在执行的xml中来导入约束文件
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targetNamespace="http://www.example.org/books"
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-->
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<schema xmlns="http://www.w3.org/2001/XMLSchema"
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targetNamespace="http://www.example.org/books"
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elementFormDefault="qualified">
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<!--
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用来定义xml的根标签必须是books
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-->
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<element name="books">
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<!--
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声明books是复杂标签
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复杂标签:拥有子标签或者属性的标签
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-->
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<complexType>
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<!--
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通过sequence标签指定子标签的顺序
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用来指定books的子标签有哪些
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-->
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<sequence>
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<element name="book" maxOccurs="3" minOccurs="1">
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<!--设置book标签是复杂标签-->
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<complexType>
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<!--设置book标签的子标签顺序-->
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<sequence>
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<element name="name" type="string"></element>
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<element name="author" type="string"></element>
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<element name="price" type="string"></element>
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</sequence>
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<!--设置book标签有属性叫address-->
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<attribute name="address"></attribute>
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</complexType>
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</element>
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</sequence>
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</complexType>
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</element>
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</schema>
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