title: XSL substring and indexOf
body: <p>I'm new to XSLT. I wonder if it is possible to select a substring of an item. I'm trying to parse an RSS feed. The description value has more text than what I want to show. I'd like to get a subtring of it based on the index of some substring. Basically, I want to show the result of a substring call passing  indxOf('some_substring') and a length as parameters. Is this possible?</p>
  
  <p><strong>From comments</strong>:</p>
  
  <blockquote>
    <p>I want to select the text of a string
    that is located after the occurrence
    of substring</p>
  </blockquote>