Attempt to modify the standard RMG.

The first code snippet you provided is specifically responsible for displaying this graph in the map editor's UI. If you expand the Description tag and enter "List of shops which could be used," then in the map editor, next to this graph in the Description column, you will see... that very phrase. And the connection between elements in the xdb and game mechanics is very often implemented through the exe, and there is nothing surprising about that. The exe is programmed to read the general list of NewShopBuildings, which is located in RefTables, and randomly select buildings from it, taking into account the ShopPoints value. Analyzing the second code: Associate the NewShopBuildings graph with the field <field settings>, graph type TYPE_TYPE_ARRAY (array, or, in Russian, list).