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Artificial Intelligence and Soft Computing: Behavioral ... - Arteimi.info

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predicate boy (jim). This can be represented by a binary predicate Instance-of<br />

(jim, Boy) <strong>and</strong> consequently can be represented by fig 8.2.<br />

Agent<br />

jim<br />

Boy<br />

Instance-of<br />

Fig 8.2: Representation of instance-of (jim, Boy).<br />

Further, predicates having more than two arguments can also be<br />

represented by semantic nets [6]. For example, consider the ternary predicate:<br />

Gave (john, the-beggar, 10$). This can be represented by semantic nets, vide<br />

fig 8.3.<br />

Gave<br />

Instance-of<br />

Object<br />

john 10$<br />

Event<br />

The<br />

beggar<br />

Beneficiary<br />

Fig. 8.3: A semantic net, representing a ternary predicate.<br />

It is thus clear fro fig 8.3 that a predicate of arity >2 can be<br />

represented by a number of predicates, each of arity 2, <strong>and</strong> then the resulting<br />

predicates can be represented by a semantic net. For instance, the ternary

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