DTK Header and DTK Footer

{DTK Header}

You can put it inside DTK Data Driven Content Body that has Group By.

In this example:

Open

Where DTK Data Driven Content is configured like this:

Open

Output would be:

As you can see, output is display in 2 groups: Owner and Payments Group. (This group is base from the Group By configured on the DTK Data Driven Content.) where Owner has 1 item and Payments has 2.