the table group style. This defines that a specified style (eg, column and row specifications) is to be applied to the table group. Although the CALS table model allows the value of this attribute to determine the presentation style of the table (in terms of the table rulings, the frame, the orientation etc), S1000D mandates that the presentation attributes are populated with the correct values to make the table display correctly in any application. The attribute tgstyle can be used by a project or organization to allow the definition and subsequent checking of business rules that apply standard project table.