title: passing multiple values dynamically in ant build.xml
body: <p>Am trying to do something like the below..</p>
  
  <pre><code> &lt;property name="INSTANCE_NAME" value="${PRODUCT5_JBOSS_INSTANCE}" /&gt;
  </code></pre>
  
  <p><code>PRODUCT5_JBOSS_INSTANCE</code>-takes the value of that key name from a property file So when i give like the above my value for <code>INSTANCE_NAME = product5-jboss</code>.</p>
  
  <p>But the above line is repeated multiple times for different products like</p>
  
  <pre><code>  &lt;property name="INSTANCE_NAME" value="${PRODUCT6_JBOSS_INSTANCE}" /&gt;
     &lt;property name="INSTANCE_NAME" value="${PRODUCT7_JBOSS_INSTANCE}" /&gt;
  </code></pre>
  
  <p>So inside <code>value="${PRODUCT7_JBOSS_INSTANCE}"</code> i would like to pass product7 dynamically like the below..</p>
  
  <p><code>value="${${PRODUCT_NUMBER}_JBOSS_INSTANCE}"</code> --But this doesnt work.Because two $ symbols doesnt work.My target now is <code>PRODUCT_NUMBER</code> should get the value as <code>PRODUCT7</code> and then 
   <code>PRODUCT7_JBOSS_INSTANCE</code> should get the value from file as <code>product7-jboss</code></p>
  
  <p>Can u help me with an approach for this</p>