flex Examples - LPIS

32 Flex Example Listingsframe ice_cream is a medium_itemdefault container is a cardboard_carton anddefault condition is frozen .frame crisps is a small_itemdefault container is a plastic_bag anddefault condition is fragile .frame salted_peanuts is a small_itemdefault container is a plastic_bag anddefault condition is salted .frame beer is a large_itemdefault container is a bottle anddefault condition is liquid .frame lemonade is a large_itemdefault container is a bottle anddefault condition is liquid .frame washing_powder is a large_itemdefault container is a cardboard_carton anddefault condition is powder .% this section defines the questions used in the expert systemquestion shoppingWhat is on your shopping list today ? ;choose some of goodsbecause I need to check your shopping and then pack it into bags .question drinkYou must select a drink ! ;choose one of drinkbecause There are nibbles on your shopping list .% this ruleset defines the forward chaining checking phase% successful rules are removed after they are firedruleset checking_rules containscheck_nibbles,check_bread_and_butter,check_butter_and_bread ;update ruleset by removing each selected rule .rule check_nibblesif the shopping includes X and X is some nibblesand the shopping does not include some drinkthen ask drinkand include the drink in the shoppingbecause Nibbles make you thirsty .rule check_bread_and_butterif the shopping includes breadand the shopping does not include butterthen include butter in the shoppingand flash( 'You', forgot, the, butter )because Bread is very dry by itself .A Guide to the Flex Expert System Toolkit