XML Tutorial/XML Schema/ENTITY

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The ENTITY datatype is derived from the NCName type.

   <source lang="xml">

The value of ENTITY must match an unparsed entity name declaration in a notation element in the schema.

<xsd:notation name="jpg" public="image/jpg"

 system="JPG_viewer.exe"/>

<xsd:complexType name="entityref">

 <xsd:sequence>
  <xsd:element name="picture">
   <xsd:complexType>
    <xsd:complexContent>
     <xsd:extension base="xsd:anyType">
      <xsd:attribute name="image"type="xsd:ENTITY"/>
     </xsd:extension>
    </xsd:complexContent>
   </xsd:complexType>
  </xsd:element>
 </xsd:sequence>

</xsd:complexType>

<picture image="jpg">Brochure</picture></source>