code: @Override
      public int append2SQLSelect(final Type _type,
                                  final SQLSelect _select,
                                  final int _tableIndex,
                                  final int _colIndex)
      {
          int ret = 0;
          if (getParent() == null || !"type".equals(getParent().getValueType())) {
              _select.column(_tableIndex, "ID");
              getColIndexs().add(_colIndex);
              ret++;
              this.attribute = _type.getAttribute("ID");
          }
          return ret;
      }
docs: {@inheritDoc}