code: public void requeryLabel()
      {
          try {
              final ValueParser parser = new ValueParser(new StringReader(this.valueLabel));
              final ValueList valList = parser.ExpressionString();
              final PrintQuery print = new PrintQuery(getInstance());
              valList.makeSelect(print);
              if (print.execute()) {
                  setLabel(valList.makeString(getInstance(), print, getMode()).toString());
              }
          } catch (final EFapsException e) {
              throw new RestartResponseException(new ErrorPage(e));
          } catch (final ParseException e) {
              throw new RestartResponseException(new ErrorPage(e));
          }
      }
docs: This method is updating the Label, by querying the eFaps-DataBase.