Parse XML using APEX

string  xmlstring =  '<?xml version="1.0" encoding="UTF-8"?><OTPResp status="1" ts="2016-06-09T17:24:46" txn="20160609172112021" resCode="ad3198bda02e3742571c855b50c576de2e8c8641" errCode="" errMsg=""></OTPResp>';
                 
                  DOM.Document xmlDOC = new DOM.Document();

                    xmlDOC.load(xmlstring);

                    DOM.XMLNode rootElement = xmlDOC.getRootElement();

                    //outxmlstring=String.valueof(xmlDOC.getRootElement().getChildAttribute());

                     outxmlstring=String.valueof(rootElement.getAttributeValue('status',null));

                     outxmlstring1 =String.valueof(rootElement.getAttributeValue('resCode',null));

                      system.debug('++++outxmlstring '+outxmlstring );

   Output: outxmlstring = 1
              outxmlstring1 = ad3198bda02e3742571c855b50c576de2e8c8641

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