I'm beginning to learn how to create qweb reports and I'm a little confused by the implementation.  Let's say that I want to get all Purchase order lines with a specific analytic distribution (I'm using the 'Use multiple analytic accounts' checkbox in Settings -> Accounting). 

What I would like to do is have a report where foreach analytic distribution we create a page.  On this page, we group all purchase order lines underneath it and display some relevant information (Qty, name, state), etc.

Is there any way in qweb to group the data in this way?