In our "Hello World" document we used a string constant to greet our users. While some of them may find this polite, it is bluntly useless; now it is time to give some more information, and we will add a report to the document to display real numbers.
When creating documents we speak about datasets; a report is a dataset, a graph is also a dataset, and we said that a document can be based on more than one dataset.
Before going further, I would like to clarify a point and give my own point of view: the document datasets do not have to be pre-existing reports. We can build them specifically for the sole purpose of document creation. And it is perfectly acceptable: let me explain.
There is something that happens ...