data and file structures for Virtuemart 3.x

[amedesign]

I experienced that the most difficult situation I was faced of (except the php coding, course ) when I tried to style or even modifying a php file was to discover what file is generating a specific html line or where is a specific class defined. Usually I try to search by using the value of a constant, find in the override language, search then the constant inside all the php files saved local. Sometimes it works, sometime it isn't work, because some php files call other files so it a big challenge to localizate a specific information, necessary for understanding the way everything works.

I try to search such documentation and I found a great resource:

https://docs.virtuemart.net/api-vm2/annotated.html

For the moment this is more than I expected, will takes months for reading it, but I will do it. I am sure that I will find what I was looking for, only something which helps me finding easier the relation between a specific file and a specific task made in Virtuemart 3.

Is there any documentation for Virtuemart 3 as it is for Virtuemart 2? Or there is not big difference (considering the structure) between these two Virtuemart versions?