I'm a brick-and-mortar engineer who's forced by circumstance to study a lot of law, particularly Administrative Law, Constitutional Law, and EU Law. I find the procedures and control flows (if A is true, then do B or refer to Article C; while D is happening, keep doing E) a bit overwhelming to understand, especially in the context of the EU's array of institutions with complex mutual dependencies.
I'd therefore like to diagram them to be more readable and easy to understand and memorize, and play with applying it to hypotheticals. Is there a known standard to do so, or, at least, guidelines for best practices?