web interface: stores a customers cart object
| Column Name | Type | Properties | Docu |
| cartid | string:32 | Primary-Key | the cookie for this cart |
| timeout | int64 | when the cart expires | |
| customerid | int32 | NULL-able Foreign-Key=customer(customerid) | ID of the customer connected to this cart. |
| invoiceaddress | int64 | NULL-able Foreign-Key=address(addressid) | If not null: the address the invoice goes to. |
| deliveryaddress | int64 | NULL-able Foreign-Key=address(addressid) | If not null: the address the delivery goes to. If null: assumed to be identical to invoiceaddress. |
| comment | text | NULL-able | customer comments during order process |
| shippingtype | int32 | NULL-able Foreign-Key=shipping(shipid) | pointer to shipping type (none per default, programmatic default is in config) |
| couponid | string:32 | NULL-able Foreign-Key=coupon(couponid) | If not null: the ID of the coupon that will be used for the order. |