title: How to use XSLT to update a single value in an XML?
body: <p>I have a giant XML file in which I would like to update a single value. Is there a way to write an XSLT file which will produce an exact copy of the existing XML file with a simple change? </p>
  
  <p>For instance, let's say I have the following XML and that I want to change the position number of employee Martin to 100. How can I do this?</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;Employees&gt;
    &lt;!-- ... --&gt;
  
    &lt;Employee name="Martin"&gt;
      &lt;Position number="50" /&gt;
    &lt;/Employee&gt;
  
      &lt;!-- ... --&gt;
  &lt;/Employees&gt;
  </code></pre>