title: Get value from SOAP Message using Xpath
body: <p>I'm trying to get a value from  from the following SOAP Message, but maybe my syntax on XPath is not good</p>
  
  <p>XPath I'm using:</p>
  
  <pre><code>/soap:Body/n0:RequestSystemGuidResponse/SystemGuid
  </code></pre>
  
  <p>Error: </p>
  
  <blockquote>
    <p><code>Error processing xml. Namespace
    prefix 'n0' is not defined.</code></p>
  </blockquote>
  
  <p>SOAP XML:</p>
  
  <pre><code>&lt;soap-env:Envelope xmlns:soap-env="http://schemas.xmlsoap.org/soap/envelope/"&gt;
      &lt;soap-env:Header&gt;&lt;/soap-env:Header&gt;
      &lt;soap-env:Body&gt;
          &lt;n0:RequestSystemGuidResponse 
              xmlns:n0="urn:sap-com:document:sap:soap:functions:mc-style"&gt;
              &lt;Errors&gt;&lt;/Errors&gt;
              &lt;SystemGuid&gt;E050831C9CA1D1F1A9FC005056B95649&lt;/SystemGuid&gt;
          &lt;/n0:RequestSystemGuidResponse&gt;
      &lt;/soap-env:Body&gt;
  &lt;/soap-env:Envelope&gt;
  </code></pre>