Table structure and relationships

Hi All;

I hope I am posting my question in a right forum.  If not my apologies.

I am pretty new to ARAS.  My knowledge is limited to navigating the program at the user level.  I have recently been asked to create a few reports in ms access from ARAS.  I am familiar with tables and relationships in ERP systems.  However, I can't figure out the relationship between tables in ARAS. Any help will be greatly apprciated.

I am looking into BOMs only at this stage.  We start at a product level and drill down BOM based on available options.

Many thanks in advance

Rod