-for nominal attributes, rules with logic predicates.  - for real valued attributes; hyper rectangles, decision tree, synthetic prototypes, hyper-ellipsoids.
-for nominal attributes, rules with logic predicates.  - for real valued attributes; hyper rectangles, decision tree, synthetic prototypes, hyper-ellipsoids.
can be represented in data structures(trees,list) and interpretive procedures(search, sort). categories of this term are objects, events, performance, meta knowledge.