Stocks by attributes

[oboeonetwothree]

I just download this mod from the Zen-Cart site.
On the admin/products_with_attributes_stock.php and the admin/functions/extra_functions/functions_qty_attribute.php files I had to fix the table calls. Instead of calling the defined tables, the scrips were calling the actual table names.

What's the difference between defined tables and actual table names in terms of examples and why it matters?

If I were to guess I'd say that the difference is like that of creating a sql query or referencing a previously created sql query from one of the header_php.php files. My guess doesn't sound close to me.