title: Xpath not contains
body: <p>Is there a way to select the xpath which doesn't contain <code>ng-show</code> 
  Please find the xpath below: 
  I'm familiar with not(contains()), but it has 2 parameters.
  I would like it to not contain the <code>ng-show</code>itself, because I have a few more element containing ng-show and I don't want to select any of them.  </p>
  
  <pre><code>&lt;span ng-show="displayValue" class="ng-binding"&gt;0 km&lt;/span&gt;
  </code></pre>
  
  <p>Thanks in Advance</p>