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(: Test: K-NumericSubtract-20                            :)
(: Written by: Frans Englich                             :)
(: Date: 2006-10-05T18:29:36+02:00                       :)
(: Purpose: A test whose essence is: `(xs:double(6) - xs:double(2)) instance of xs:double`. :)
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(xs:double(6) - xs:double(2)) instance of xs:double