The solution is very flexible, so you can create anything you want. Think of the possibilities you have in Excel or in Word, because these are the two document generators that are used the most. I only use Word, but I can use nearly every feature in Word, including making charts and tables, and produce those features in Windward, parametrically.
The ability to embed, and dynamically repeat, templates within each other is a very simple yet extremely powerful tool.
Globally, the ability to create document templates in several formats by using a rich syntax is simple and clear to understand.