title: xpath to select nodes excluding by attribute value list
body: <p>I would like to know if there is shorter approach to selecting a list of nodes ignoring the ones that have an attribute value specified in a list</p>
  
  <p>Working example:</p>
  
  <pre><code>/item[not(@uid='id1') and not(@uid='id2')]
  </code></pre>
  
  <p>Desired alternative:</p>
  
  <pre><code>/item[not(@uid in('id1','id2'))]
  </code></pre>