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import module namespace xqxq = 'http://www.zorba-xquery.com/modules/xqxq';
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variable $query-key := xqxq:prepare-main-module('
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declare variable $a external;
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declare variable $b external := 2;
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declare variable $c external;
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xqxq:is-bound-variable($query-key, xs:QName('x'))
b'\\ No newline at end of file'