# subset [*Relation*]

## Purpose

The **subset** relation tests whether a set is a subset of another set.

## Syntax

**subset** *set1 set2*

## Domain

The *set1* argument is a list of objects.

## Range

The *set2* argument is a list of objects.

## Examples

(ask (subset '(3 4) '(3 5 4))) ==> T
(tellm (:about Fred (:filled-by friends Joe Sue))
(:about Mary (:filled-by friends Sue Joe Pam)))
(ask (subset (friends Fred) (friends Mary))) ==> T

## See Also

Last modified: Jun 1 1995