Representation: Design Axes
Attributes
Objects
Categorical
Probabilistic
Epistemic state
World state
Propositional logic
CSPs
First-order logic
Relational databases
Sequences
Automata
Grammars
Bayesian nets
Markov nets
n-gram models
HMMs
Prob. CFGs
Many of the standard methods can be categorized along this axis.
But, there is also a second important design decision --- how do we
represent the epistemic state of the agent, its beliefs about the world.
Two common choices are categorical, or deterministic, beliefs, and
probabilistic beliefs.