title: Replace part of XML node value
body: <p>I'm trying to replace a part of a xml node value with another value. For example, I've this node in my xml:</p>
  
  <pre><code>&lt;eerste_kwartier&gt;naam leeg&lt;/eerste_kwartier&gt;
  </code></pre>
  
  <p>or for example: </p>
  
  <pre><code>&lt;eerste_kwartier&gt;leeg leeg&lt;/eerste_kwartier&gt;
  </code></pre>
  
  <p>In the first example I want to replace the 'leeg' value with something else. In the second I only want to replace the first 'leeg' value with something else. Any ideas how I should do this?</p>
  
  <p>Thanks in advance,</p>
  
  <p>Jan Thiemen</p>