title: How to perform string operation on JSON MEL in mule esb
body: <p>I want to perform some string operation on MEL I have following expression in MEL</p>
  
  <pre><code>&lt;logger message="#[json:xy/PID/xy.3/AC]" level="INFO" doc:name="Logger"/&gt;
  </code></pre>
  
  <p>OUTPUT IS </p>
  
  <p>19901026000000</p>
  
  <p>I want to extract 1st 4 digit then 6,7 digit . </p>
  
  <p>How can I do this ??</p>
  
  <p>Thanks</p>