regex101: Extract all XML attribute names

Regular Expression

<(\w*?)>

Test String
New

<soapenv:Envelope...>
   <soapenv:Header/>
   <soapenv:Body>
      <urn:ClosedRequest>
         <ExternalApplicationNumber>4816</ExternalApplicationNumber>
         <PersonDataList>
            <!--1 or more repetitions:-->
            <PersonData>
               <PersonExternalIdentifier>sa1</PersonExternalIdentifier>
               <EligibilityEndDate>2017-12-31</EligibilityEndDate>
               <!--Optional:-->
               <ReasonCode>60</ReasonCode>
               <PersonDeathDate>2015-09-02</PersonDeathDate>
            </PersonData>
         </PersonDataList>
      </urn:ClosedRequest>
   </soapenv:Body>
</soapenv:Envelope>

Regular Expression

Test StringNew

Test String
New