title: Why no match for my XPath expression?
body: <p>I used <a href="http://www.freeformatter.com/xpath-tester.html" rel="nofollow">http://www.freeformatter.com/xpath-tester.html</a> to get <code>UserId</code> value on </p>
  
  <pre><code>  &lt;soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" 
                      xmlns:paf="http://paf.mycompany.com/"&gt;
       &lt;soapenv:Header/&gt;
       &lt;soapenv:Body&gt;
          &lt;paf:requestpafBean&gt;
             &lt;!--Optional:--&gt;
             &lt;arg0&gt;
                &lt;!--Optional:--&gt;
                &lt;UserId&gt;?&lt;/UserId&gt;
                &lt;!--Optional:--&gt;
                &lt;DateNow&gt;?&lt;/DateNow&gt;
             &lt;/arg0&gt;
          &lt;/paf:requestpafBean&gt;
       &lt;/soapenv:Body&gt;
    &lt;/soapenv:Envelope&gt;
  </code></pre>
  
  <p>to test this XPath expression :</p>
  
  <pre><code>//paf:UserId[1]/@text
  </code></pre>
  
  <p>Why do I get no match ?</p>