docs: def data(self, data):
          """Called for text between tags"""
          if self.state == STATE_SOURCE_ID:
              self.context.audit_record.source_id = int(data)  # Audit ids can be 64 bits
          elif self.state == STATE_DATETIME:
              dt = datetime.datetime.strptime(data, "%Y-%m-%dT%H:%M:%S")
              self.get_parent_element().datetimestamp = dt
          elif self.state == STATE_REASON_FOR_CHANGE:
              self.context.audit_record.reason_for_change = data.strip() or None  # Convert a result of '' to None.
          self.state = STATE_NONE