title: How to include additional function in XSLT 2.0
body: <p>I wanted to use the function 'substring-before-last' defined on <a href="http://www.functx.com" rel="nofollow noreferrer">http://www.functx.com</a>. For this I added xmlns:functx="http://www.functx.com" in the <code>&lt;xsl:stylesheet&gt;</code> statement at top and then tried calling the function using functx:substring-before-last. I am getting an error 'Unknown Function'. </p>
  
  <p>If you have tried using the additional functions defined outside XSL, please let me know how to do this. </p>