web interface: shop items in the cart
| Column Name | Type | Properties | Docu |
| ciid | seq64 | Primary-Key | simple counter for a primary key |
| cartid | string:32 | Foreign-Key=cart(cartid) | the cart it is in |
| productid | int32 | Foreign-Key=product(productid) | the product being purchased |
| amount | int32 | amount of items of this type |