title: parse xml with namespaces with gdata xml
body: <p>i am developping an ios application and i am parsing my xml with gdataxml, but i am doing it wrong, my nslog is null </p>
  
  <pre><code>NSError *error = nil;
  GDataXMLDocument *xmlResult = [[GDataXMLDocument alloc] initWithData:data options:0 error:&amp;error];
  if (error) {
      NSLog(@"%@",error);
  }
  </code></pre>
  
  <p>NSLog(@"%@",xmlResult.rootElement);
     my root element is perfect, the error is with tempArray</p>
  
  <pre><code>NSArray *tempArray = [xmlResult nodesForXPath:@"//message/error/value" error:&amp;error];
  </code></pre>
  
  <p>NSLog(@"mon array %@",tempArray);</p>
  
  <p>my array is null,</p>
  
  <p>my xml is like this :</p>
  
  <pre><code>&lt;message xmlns="http://.....Api" xmlns:i="http://www.w3.org/...."&gt;
  &lt;error i:nil="true"/&gt;
  &lt;value&gt;
  </code></pre>
  
  <p>i am sur that my problème is with the namespace, but i don't how to do it ?</p>
  
  <p>thanks for your answer</p>