https://opensource.adobe.com/wiki/display/flexsdk/Coding+Conventions
Some good stuff here. The one thing that bugs me is that this is termed a “Flex” document.
This document lays out the coding standards for writing open-source Flex framework components in ActionScript 3.
But there is virtually NOTHING Flex-specific in there. It’s all straight AS3 coding conventions. I wish Adobe would get off its Flex fixation and acknowledge the existence of AS3 as a standalone language.