groupname book's isbn varchar book's catagory + .... (it is allowed to use only the first category) .. ? ... + string ? a keyword... * 999.99 (any number of digits, two decimals required) 10.00 ? dollar amount, difference from the original price integer > 0. Amount available. (Sum over all warehouses.) optional.... ? + the unique id of CD(sting) album name genre + like author + recording company as before as before ? as before Amount available. (Sum over all warehouses.) as before optional.... ? + shipping vendors that ships stuff for your company name of this vendor (UPS, FEDEX etc.) url ? 1800-xxx-xxxx (string) ? address..... ... XX (2 characters) xxxxx (int, 5 digits since someone objected to have a country field) * standard, next day, overnight, air, missile, teleport.... etc. anything same format as before ? same format ? same format ? (missing means 0) max weight allowed. ? cities of destination that can be selected * + + ------------------------------------------ + means 1 or more occurrence * means kleene star in regular expression.... (0 or more) ? means optional