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(: Test: K-SeqExprCastable-2                             :)
(: Written by: Frans Englich                             :)
(: Date: 2006-10-05T18:29:39+02:00                       :)
(: Purpose: '+' nor '?' is allowed as a cardinality specifier in 'castable as'. :)
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'string' castable as xs:string+