xml elementFormDefault="qualified">错误
大家帮着看看哪错了?
<?xml version="1.0" encoding="GB2312" ?>
<Catalog xmlns="x-schema:Cd_Catalog.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="x-schema:Cd_Catalog.xsd Cd_Catalog.xsd">
<CD>
<Title>Empire Burlesque</Title>
<Singer>Bob Dylan</Singer>
<Country>美国</Country>
<Company>哥伦比亚唱片公司</Company>
<Price>10.90 元</Price>
<Year> 1985 </Year>
<Message>很不错</Message>
</CD>
<CD>
<Title> Hide your heart </Title>
<Singer> Celion </Singer>
<Country>英国</Country>
<Company>CBS 唱片公司</Company>
<Price>9.90 元</Price>
<Year> 2000 </Year>
<Code> 7367 </Code>
</CD>
<CD>
<Title> Greatest Hits </Title>
<Singer> Dolly Parton </Singer>
<Country>美国</Country>
<Company> RCA </Company>
<Price>9.90 元</Price>
<Year> 1982 </Year>
<Message>老歌</Message>
</CD>
<CD>
<Title> Still got the blues </Title>
<Singer> Gary Moore </Singer>
<Country>英国</Country>
<Company>维京唱片公司</Company>
<Price>10.20 元</Price>
<Year> 1990 </Year>
<Code> 8936 </Code>
</CD>
</Catalog>
<?xml version="1.0" encoding="gb2312" ?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns="x-schema:Cd_Catalog.xsd"
targetNamespace="x-schema:Cd_Catalog.xsd"
elementFormDefault="qualified">
<xs:element name="CD">
<xs:complexType>
<xs:sequence>
<xs:element ref="Title"/>
<xs:element ref="Singer"/>
<xs:element ref="Country"/>
<xs:element ref="Company"/>
<xs:element ref="Price"/>
<xs:element ref="Year"/>
<xs:choice>
<xs:element ref="Message" minOccurs="0"/>
<xs:element ref="Code" minOccurs="0"/>
</xs:choice>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="Catalog">
<xs:complexType>
<xs:sequence>
<xs:element ref="CD" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="Code" type="xs:string"/>
<xs:element name="Company" type="xs:string"/>
<xs:element name="Country" type="xs:string"/>
<xs:element name="Message" type="xs:string"/>
<xs:element name="Price" type="xs:string"/>
<xs:element name="Singer" type="xs:string"/>
<xs:element name="Title" type="xs:string"/>
<xs:element name="Year" type="xs:string"/>
</xs:schema>