XML/XML Schema/prohibited

Use prohibited

   <source lang="xml">

File: Data.xml <?xml version="1.0"?>

   <glob length="5" height="3" width="1" radius="2" diameter="4"/>
   <computer-monitor length="24" height="20" width="19"/>

File: Schema.xml <?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="shape">
       <xsd:attribute name="length" type="xsd:nonNegativeInteger"/>
       <xsd:attribute name="height" type="xsd:nonNegativeInteger"/>
       <xsd:attribute name="width" type="xsd:nonNegativeInteger"/>
       <xsd:attribute name="radius" type="xsd:nonNegativeInteger"/>
       <xsd:attribute name="diameter" type="xsd:nonNegativeInteger"/>
   </xsd:complexType>
   <xsd:complexType name="box">
       <xsd:complexContent>
           <xsd:restriction base="shape">
               <xsd:attribute name="length" type="xsd:nonNegativeInteger"/>
               <xsd:attribute name="height" type="xsd:nonNegativeInteger"/>
               <xsd:attribute name="width" type="xsd:nonNegativeInteger"/>
               <xsd:attribute name="radius" type="xsd:nonNegativeInteger" use="prohibited"/>
               <xsd:attribute name="diameter" type="xsd:nonNegativeInteger" use="prohibited"/>
           </xsd:restriction>
       </xsd:complexContent>
   </xsd:complexType>
   <xsd:element name="glob" type="shape"/>
   <xsd:element name="computer-monitor" type="box"/>
   <xsd:element name="data">
       <xsd:complexType>
           <xsd:sequence>
               <xsd:element ref="glob"/>
               <xsd:element ref="computer-monitor"/>
           </xsd:sequence>
       </xsd:complexType>
   </xsd:element>

</xsd:schema>

</source>