elementFormDefault="qualified" and include
File: Data.xml
<?xml version="1.0"?>
<Course xmlns="http://www.java2s.com"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation=
"http://www.java2s.com
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>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.java2s.com"
xmlns="http://www.java2s.com"
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"
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.java2s.com"
xmlns="http://www.java2s.com"
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>
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