title: groovy XmlSlurper parse XML
body: <p>I get a XML file like this:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
  &lt;soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:udb="http://somenamespace&gt;
      &lt;soap:Header/&gt;
      &lt;soap:Body&gt;
          &lt;udb:ProvideUDBIdentityInformationRequest&gt;
              &lt;udb:RequestID&gt;1&lt;/udb:RequestID&gt;
              &lt;udb:IDnumber&gt;1&lt;/udb:IDnumber&gt;
              &lt;udb:UnifiedNumber&gt;3&lt;/udb:UnifiedNumber&gt;
          &lt;/udb:ProvideUDBIdentityInformationRequest&gt;
      &lt;/soap:Body&gt;
  &lt;/soap:Envelope&gt; 
  </code></pre>
  
  <p>I want to save the below string to another file.</p>
  
  <pre><code>    &lt;soap:Body&gt;
          &lt;udb:ProvideUDBIdentityInformationRequest&gt;
              &lt;udb:RequestID&gt;1&lt;/udb:RequestID&gt;
              &lt;udb:IDnumber&gt;1&lt;/udb:IDnumber&gt;
              &lt;udb:UnifiedNumber&gt;3&lt;/udb:UnifiedNumber&gt;
          &lt;/udb:ProvideUDBIdentityInformationRequest&gt;
      &lt;/soap:Body&gt;
  </code></pre>
  
  <p>How can I achieve that ?
  In fact, I've refer to some tutorial like this one ,<a href="http://groovy.codehaus.org/Reading+XML+using+Groovy%27s+XmlSlurper" rel="nofollow">http://groovy.codehaus.org/Reading+XML+using+Groovy%27s+XmlSlurper</a>, but cannot find such a method in XmlSlurper.</p>
  
  <p>Thanks in advance!</p>