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<businesses>
    <entity name="Retail">
...
      </product>
    </entity>
</businesses>

<businesses>
    <block name="Retail" min="0" max="3">
...
        </item>
    </block>
</businesses>

<entity name="Retail">
      <description>Products and items available in retail</description
+>
      <product min="0" max="3">

    
<block name="Retail" min="0" max="3">
      <description>Products and items available in retail</description
+>

      </product>
    </entity>

    
    </block>

    
########### Process the Input string ############
...
  
}