flex Expert System Toolkit - LPIS

Appendix A - Examples 169
frame feline is a mammal , carnivore
default legs are 4 and
default speed is 'very fast' and
default tail is { long and furry } .
frame rodent is a mammal , herbivore
default habitat is sewer and
default status is pest and
default tail is { short and thin } .
frame human is a mammal
default brain is large and
default legs are 2 and
default skills are { tool_making } .
frame cat is a feline
default size is medium .
frame tiger is a feline
default habitat is jungle and
default meal is human and
default state is predator and
default size is large .
frame squirrel is a rodent
default size is small and
default tail is { long and bushy } .
Unlike most other rodents, whose tails are generally short and thin, the
tail of a squirrel is long and bushy.
frame manx is a cat ;
do not inherit tail .
Unlike other cats, a manx does not have a tail. This is represented by not
inheriting the tail attribute.
instance sammy is a cat ;
habitat is my_house ;
inherit meal from herbivore .
The instance called sammy illustrates the technique of overriding the frame
hierarchy for a particular attribute. sammy will inherit its meal type from
herbivore.
instance sylvester is a cat ;
habitat is my_house ;
meal is tweety_pie ;
skin is shaggy .
instance shere_khan is a tiger ;
meal is mowgli .
instance mowgli is a human ;
skills are { fire_making } .
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