Thanks for your response.

I spent a couple of hours yesterday researching QWeb in the docs, but I didn't find the information you gave above. I didn't look at the reports documentation though.

I may be mistaken, but this information seems to be left out of the documentation. The QWeb documentation page seems to focus exclusively on the directives available in QWeb.

The documentation isn't always enough to help people as the learn to work with Odoo. The system is Open core so looking at the source code, including how Odoo uses QWEB within the default Views and Reports, is a great way to get additional information.

Do you have any tips for deep diving through the source code? Also, are there any good resources that explain the Odoo's architecture in depth? Most documentation I have found is a surface level treatment of the subject.

I find a combination of the following useful to me, but it really depends on your background: (1) the prior documentation platform at https://doc.odoo.com/trunk/server/ is still useful and explains the architecture. (2) there are a series of books you can purchase: https://www.amazon.com/s/ref=nb_sb_noss_2?url=search-alias%3Dstripbooks&field-keywords=odoo (3) many useful videos at https://www.youtube.com/channel/UCkQPikELWZFLgQNHd73jkdg (4) slides from the Odoo Experience at https://www.odoo.com/slides/odoo-experience-2017-12 (5) I suggest learning how to use pdb (python debugger) along the lines of what is outlined at http://www.zbeanztech.com/blog/debugging-openerp