all Model group having minoccurs and maxoccurs

Hi..

 

For the following schema, altova is giving error but LIBXML is not giving
any error. Please reply me whether the following is a valid schema or
invalid schema.

 

 

<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">

       <xsd:group name="group">

              <xsd:all minOccurs="0" maxOccurs="0">

                     <xsd:element name="e1"/>

              </xsd:all>

       </xsd:group>

</xsd:schema>

 

Thanks and Regards,

Bharath.

 

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