xsd例子一则

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
	targetNamespace="http://www.example.org/cars"
	xmlns="http://www.example.org/cars" elementFormDefault="qualified">
	<xs:element name="car" type="car-type"></xs:element>

	<xs:complexType name="car-type">
		<xs:sequence>
			<xs:group ref="size"/>
			<xs:element name="color" type="color-type" />
			<xs:element name="price" type="price-type" />
		</xs:sequence>
		<xs:attributeGroup ref="pay-attribute"/>
	</xs:complexType>
	
	<xs:group name="size">
		<xs:sequence>
			<xs:element name="length" type="xs:integer"/>
			<xs:element name="width" type="xs:integer"/>
			<xs:element name="height" type="xs:integer"/>
		</xs:sequence>
	</xs:group>
	
	<xs:attributeGroup name="pay-attribute">
		<xs:attribute name="period" type="xs:integer" use="required"/>
		<xs:attribute name="eachPerMonth" type="xs:integer" use="required"/>
	</xs:attributeGroup>

	<xs:simpleType name="color-type">
		<xs:restriction base="xs:string">
			<xs:enumeration value="red" />
			<xs:enumeration value="green" />
			<xs:enumeration value="black" />
			<xs:enumeration value="white" />
		</xs:restriction>
	</xs:simpleType>

	<xs:complexType name="price-type">
		<xs:sequence>
			<xs:element name="amount" type="xs:decimal" />
		</xs:sequence>
		<xs:attribute name="concurrency" type="pay-type" use="required" />
	</xs:complexType>

	<xs:simpleType name="pay-type">
		<xs:restriction base="xs:string">
			<xs:enumeration value="dollar" />
			<xs:enumeration value="yuan" />
			<xs:enumeration value="ponds" />
		</xs:restriction>
	</xs:simpleType>

	<xs:complexType name="pay-type2">
		<xs:simpleContent>
			<xs:extension base="xs:integer">
				<xs:attribute name="concurrency" type="xs:string" />
			</xs:extension>
		</xs:simpleContent>
	</xs:complexType>
</xs:schema>