API docs, MVC examples

Hi,

I would like to program a converter for migrating from a _custom_ xtcommerce3 shop to open cart recent version.

Where do I find a structured API documentation and maybe some coding examples?

The script doesn't need to be a plugin or something, just a command line tool running only one time ever. Also no need for a view, just simple console output.

Where can I find examples about the model and the database abstraction layer?

In which directories is the MVC framework stored?

Thanks

It's MVC(L), actually, and the meaning of that is:
Model
View
Controller
Language
exactly as the structure of OC looks like, and where OC takes Place!
---
viewtopic.php?f=190&t=171137&hilit=MVC#p649099
---
viewtopic.php?f=181&t=170234&hilit=MVC#p645806
---
Ernie

Take a look at http://docs.opencart.com/