The XSD Schema (books.xsd) 

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The following document shows the books.xsd schema used in this example.

If you want to run the example in this topic, copy the following code to a text editor, such as Notepad, and then save the file as books.xsd.

<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <xsd:element name="catalog">
    <xsd:complexType>
      <xsd:sequence>
        <xsd:element name="book" 
                     minOccurs="0" 
                     maxOccurs="unbounded">
           <xsd:complexType>
              <xsd:sequence>
                 <xsd:element name="author" type="xsd:string"/>
                 <xsd:element name="title" type="xsd:string"/>
                 <xsd:element name="genre" type="xsd:string"/>
                 <xsd:element name="price" type="xsd:float"/>
                 <xsd:element name="publish_date" type="xsd:date"/>
                 <xsd:element name="description" type="xsd:string"/>
                 </xsd:sequence>
               <xsd:attribute name="id" type="xsd:string"/>
          </xsd:complexType>
        </xsd:element>
      </xsd:sequence>
    </xsd:complexType>
  </xsd:element>
</xsd:schema>