Good notation for showing MVC interactions (i.e. Django)

[Alec Taylor]

Good morning,

I'm developing various websites and functionality to cater to various
different use-cases up in Django.

Is there a good notation for showing what behaviour is at each stage,
i.e. using swimlanes?

I use BPMN 2 notation for everything, but I feel I am overusing this,
and that there would be a more suitable one for this.

Thanks for all suggestions,

Alec Taylor