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(: Test: K-SeqExprCast-419                               :)
(: Written by: Frans Englich                             :)
(: Date: 2007-11-22T11:31:21+01:00                       :)
(: Purpose: 'castable as' involving xs:untypedAtomic as source type and xs:untypedAtomic as target type should always evaluate to true. :)
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xs:untypedAtomic("an arbitrary string(untypedAtomic source)") castable as xs:untypedAtomic