SYNTACTIC-SEMANTIC SPECTRUM
OF REPRESENTATION
One way to review the representational schemes we have just described is to consider an important dimension along which they can be characterized. At one extreme are purely syntactic systems, in which no concern is given to the meaning of the knowledge that is being represented. Such Systems have simple, uniform rules for manipulating the representation. They do not care what information the representation contains. At the other extreme are purely symantic systems, in which there is no unified form. Every aspect of the representation corresponds to a different piece of information, and the inference rules are correspondingly complicated.
So far, we have discussed eight declerative structures in which knowledge can be represented:
* Predicate logic
* Productions rules
* Nonmonotonic systems
* Statistical reasoning systems
* Semantics nets
* Frames
* Conceptual Dependency
* Scripts
* CYC
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