title: 'OR' operator in XPath predicate?
body: <p>What is the <a href="http://www.w3.org/TR/xpath/" rel="noreferrer">XPath</a> expression to select <code>&lt;link&gt;</code> elements with <code>type="application/rss+xml"</code> <strong>OR</strong> <code>type="application/atom+xml"</code> (RSS and Atom feeds)</p>
  
  <ul>
  <li><code>link[@rel='alternate'][@type='application/rss+xml']</code> selects RSS feeds</li>
  <li><code>link[@rel='alternate'][@type='application/atom+xml']</code> selects Atom feeds</li>
  </ul>
  
  <p>But what is the single XPath expression for selecting them both?</p>
  
  <p>Thank you.</p>