title: How to access property mediator outside iterator which is defined inside iterator?
body: <p>I have treed as below   </p>
  
  <pre><code>&lt;iterate xmlns:oag="http://www.openapplications.org/oagis/10" xmlns:fn="http://www.w3.org/2005/xpath-functions" continueParent="true" preservePayload="true" attachPath="//ProcessCredit/DataArea" expression="//ProcessCredit/DataArea/Credit sequential="true"&gt;
  .....
   &lt;property xmlns:ns="http://org.apache.synapse/xsd"
                          xmlns:oa="http://www.openapplications.org/oagis/10"
                          name="ChargeTransactionKey"
                          expression="concat(get-property('operation','ChargeTransactionKey'),//Extension/ValueText[@typeCode='Charge Transaction Key'],':')"
                          scope="operation"
                          type="STRING"
                          description="ChargeTransactionKey"/&gt;
   ...........
  
  &lt;/iterate &gt;
  &lt;log level="full"&gt;
  &lt;property name="requestIdChargeTransactionKey"
                    expression="get-property('operation','ChargeTransactionKey')"/&gt;
       &lt;/log&gt;
  </code></pre>
  
  <p>but value in property "requestIdChargeTransactionKey" is null, it means I'm unable to capture the property  which is defined inside iterator.</p>
  
  <p>can anybody help on syntax?</p>