List of all DataLayer Variables

Dear Thomas,
First of all: neat Plugin for WP! Great Work – keep it up.
I′m looking for a complete list of all DataLayer Variables the plugin is using. I have been searching the plugin forum, your site and everything related, but did not find something similar. Would you be able to provide something like a “Cheat-Sheet”? This would be great.
Thanks and best Regards
Sascha