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Adapting the structure of your document

The result is instance documents such as:  <?xml version="1.0"?> <library>   <book id="b1111111111" available="true">     <title lang="en">Java</title>     <isbn>1111111111</isbn>     <authors>       <author id="Client">         <start>1922-11-26</start>         <dead>2000-02-12</dead>         <name>James</name>       </author>     </authors>     <chapters>       <chapter id="PP">         <name>JButton</name>         <qualification>Yes</qualification>         <start>2005-08-22</start>       </chapter>       <chapter id="JTable">         <start>2001-10-04</start>         <name>JTable</name>         <qualification>Yes</qualification>       </chapter>     </chapters>   </book> </library> This instance document defined by a full schema, which could be:  <?xml version="1.0"?> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">   <xs:element name="name" type="xs:token" />   <xs:element name="qualification" type="xs:token" />   <xs:element name="start" type="xs:date" />   <xs:element name="dead" type="xs:date" />   <xs:element name="isbn" type="xs:NMTOKEN" />   <xs:attribute name="id" type="xs:ID" />   <xs:attribute name="available" type="xs:boolean" />   <xs:attribute name="lang" type="xs:language" />   <xs:element name="title">     <xs:complexType>       <xs:simpleContent>         <xs:extension base="xs:token">           <xs:attribute ref="lang" />         </xs:extension>       </xs:simpleContent>     </xs:complexType>   </xs:element>   <xs:element name="library">     <xs:complexType>       <xs:sequence>         <xs:element ref="book" maxOccurs="unbounded" />       </xs:sequence>     </xs:complexType>   </xs:element>   <xs:element name="authors">     <xs:complexType>       <xs:sequence>         <xs:element ref="author" minOccurs="0"           maxOccurs="unbounded" />       </xs:sequence>     </xs:complexType>   </xs:element>   <xs:element name="author">     <xs:complexType>       <xs:all>         <xs:element ref="name" />         <xs:element ref="start" />         <xs:element ref="dead" minOccurs="0" />       </xs:all>       <xs:attribute ref="id" />     </xs:complexType>   </xs:element>   <xs:element name="book">     <xs:complexType>       <xs:all>         <xs:element ref="isbn" />         <xs:element ref="title" />         <xs:element ref="authors" />         <xs:element ref="chapters" />       </xs:all>       <xs:attribute ref="id" />       <xs:attribute ref="available" />     </xs:complexType>   </xs:element>   <xs:element name="chapters">     <xs:complexType>       <xs:sequence>         <xs:element ref="chapter" minOccurs="0"           maxOccurs="unbounded" />       </xs:sequence>     </xs:complexType>   </xs:element>   <xs:element name="chapter">     <xs:complexType>       <xs:all>         <xs:element ref="name" />         <xs:element ref="start" />         <xs:element ref="qualification" />       </xs:all>       <xs:attribute ref="id" />     </xs:complexType>   </xs:element> </xs:schema>