code: protected boolean validateNodeName(String nodeName)
     {
        if(null == nodeName)
          return false;
        if(nodeName.equals("xmlns"))
          return false;
        return XML11Char.isXML11ValidQName(nodeName);
     }
docs: Validate that the node name is good.
  
  @param nodeName Name of the node being constructed, which may be null.
  
  @return true if the node name is valid, false otherwise.