title: Replace the null value with a suitable value
body: <p>I have the folllowing soap response. Now I want to replace the null value with a suitable value. How can I achieve it? </p>
  
  <pre><code>       &lt;?xml version='1.0' encoding='utf-8'?&gt;
              &lt;soapenv:Envelope xmlns:soapenv="http://www.w3.org/2003/05/soapenvelope"&gt;
                    &lt;soapenv:Body&gt;
                      &lt;Entries xmlns="http://ws.wso2.org/dataservice"&gt;
                         &lt;Entry&gt;
                               &lt;empId&gt;xxx&lt;/empId&gt;
                               &lt;empName&gt;yyy&lt;/empName&gt;
                               &lt;allocatedDesk&gt;null&lt;/allocatedDesk&gt;
                         &lt;/Entry&gt;
                      &lt;/Entries&gt;
                     &lt;/soapenv:Body&gt;
              &lt;/soapenv:Envelope&gt;
  </code></pre>