XML/XML Schema/redefine

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redefine another xml schema

   <source lang="xml">

File: Data.xml <?xml version="1.0"?> <Course xmlns="http://www.wbex.ru"

        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://www.wbex.ru Course.xsd">
   <Books>
       <Book>
               <Title>title 2</Title>
               <Author>author 2</Author>
               <Date>1977</Date>
               <ISBN>2-222-22222-2</ISBN>
               <Publisher>publisher 2</Publisher>
               <Summary>this is a test</Summary>
       </Book>
   </Books>    
   <Students>
       <Student>
           <Name>name 1</Name>
           <SSN>123-45-6789</SSN>
       </Student>
       <Student>
           <Name>name 2</Name>
           <SSN>000-11-2345</SSN>
       </Student>
   </Students>    

</Course> File: Course.xsd <?xml version="1.0"?> <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"

           targetNamespace="http://www.wbex.ru"
           xmlns="http://www.wbex.ru"
           elementFormDefault="qualified">
   <xsd:redefine schemaLocation="CourseBook.xsd">
       <xsd:complexType name="BookType">
           <xsd:complexContent>
               <xsd:extension base="BookType">
                   <xsd:sequence>
                       <xsd:element name="Summary" type="xsd:string"/>
                   </xsd:sequence>
               </xsd:extension>
           </xsd:complexContent>
       </xsd:complexType>
   </xsd:redefine>
   <xsd:include schemaLocation="CourseStudent.xsd"/>
   <xsd:element name="Course">
       <xsd:complexType>
            <xsd:sequence>
                <xsd:element name="Books">
                    <xsd:complexType>
                        <xsd:sequence>
                            <xsd:element ref="Book" maxOccurs="unbounded"/>
                        </xsd:sequence>
                    </xsd:complexType>
                </xsd:element>
                <xsd:element name="Students">
                    <xsd:complexType>
                        <xsd:sequence>
                            <xsd:element ref="Student" maxOccurs="unbounded"/>
                        </xsd:sequence>
                    </xsd:complexType>
                </xsd:element>
           </xsd:sequence>
       </xsd:complexType>
   </xsd:element>

</xsd:schema> File: CourseBook.xsd <?xml version="1.0"?> <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"

           targetNamespace="http://www.wbex.ru"
           xmlns="http://www.wbex.ru"
           elementFormDefault="qualified">
   <xsd:complexType name="BookType">
       <xsd:sequence>
           <xsd:element name="Title" type="xsd:string"/>
           <xsd:element name="Author" type="xsd:string"/>
           <xsd:element name="Date" type="xsd:string"/>
           <xsd:element name="ISBN" type="xsd:string"/>
           <xsd:element name="Publisher" type="xsd:string"/>
       </xsd:sequence>
   </xsd:complexType>
   <xsd:element name="Book" type="BookType"/>

</xsd:schema> File: CourseStudent.xsd <?xml version="1.0"?> <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"

           targetNamespace="http://www.wbex.ru"
           xmlns="http://www.wbex.ru"
           elementFormDefault="qualified">
   <xsd:element name="Student">
       <xsd:complexType>
           <xsd:sequence>
               <xsd:element name="Name" type="xsd:string"/>
               <xsd:element name="SSN" type="xsd:string"/>
           </xsd:sequence>
       </xsd:complexType>
   </xsd:element>

</xsd:schema>

</source>