characteristics [Relation]

Purpose

The characteristics relation returns the characteristics which mark a particular concept.

Syntax

characteristics concept characteristic

Domain

The concept argument is the concept or relation whose characteristics are to be found.

Range

The characteristic argument is a keyword.

Examples 

(retrieve ?x (characteristics Thing ?x)) ==> (:CLOS-CLASS) 
(retrieve ?x (characteristics characteristics ?x)) ==> 
    (:READ-ONLY :MULTIPLE-VALUED) 
(defrelation spouse :characteristics (:single-valued :symmetric)) 
(ask (characteristics spouse :single-valued)) ==> T

See Also

Last modified: Jun 1 1995