code: def _create_identifier(rdtype, name, content):
          
          sha256 = hashlib.sha256()
          sha256.update((rdtype + '/').encode('UTF-8'))
          sha256.update((name + '/').encode('UTF-8'))
          sha256.update(content.encode('UTF-8'))
          return sha256.hexdigest()[0:7]
docs: Creates hashed identifier based on full qualified record type, name & content
          and returns hash.