title: Error "System function unparsed-text#1 is not available with this host language"
body: <p>I'm using Saxon to execute the following xquery;</p>
  
  <pre><code>fn:unparsed-text("text.txt")
  </code></pre>
  
  <p>But I'm getting the following error message;</p>
  
  <pre><code>javax.xml.xquery.XQException:
  System function unparsed-text#1 is not available with this host language
  </code></pre>
  
  <p>What does that error message mean?</p>