flex Expert System Toolkit - LPIS

11. Example – Robbie Goes Shopping 160
then include bread in the shopping
and write( 'Including bread on shopping list' )
and nl
because What is the use of butter without bread .
Having written the compatibility rules, we need to determine how they will
be used.
Because there is no conflict between these rules (i.e. they do not compete by
having overlapping conditions) the order in which they are used is not
important. It is therefore best to select them on a first come first served
basis.
Also, once each rule has been selected and fired, its conditions can no
longer apply. In this case the most efficient way of updating the ruleset is by
removing each selected rule, which is equivalent to firing each rule once
only.
The ruleset that governs the checking rules would be written in KSL as
follows.
ruleset checking_rules
contains
check_snacks,
check_bread_and_butter,
check_butter_and_bread ;
select rule using first come first served ;
update ruleset by removing each selected rule .
The Resource Allocation Section
In this section the items on the final shopping list are packed into carrier
bags in terms of their type, container and size .
The Packing Rules
The packing is to be done according to container type and size. Therefore
we can classify the data as follows.
The main difference between each of the goods is their size, which can be
either large, medium or small.
The packing requirements are that only three medium and small items are
allowed in a bag and only one large item is allowed in any bag.
frame item
default maximum_allowed is 3 .
frame large_item is an item
default size is large
and default maximum_allowed is 1 .
flex toolkit