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(:**************************************************************:)
(: Test: functx-functx-if-absent-all :)
(: Written by: Priscilla Walmsley (Frans Englich is maintainer) :)
(: Date: 2008-05-16+02:00 :)
(:**************************************************************:)
declare namespace functx = "http://www.example.com/";
(:~
: The first argument if it is not empty, otherwise the second argument
:
: @author W3C XML Query WG
: @version 1.0
: @see http://www.xqueryfunctions.com/xq/functx_if-absent.html
: @param $arg the item(s) that may be absent
: @param $value the item(s) to use if the item is absent
:)
declare function functx:if-absent
( $arg as item()* ,
$value as item()* ) as item()* {
if (exists($arg))
then $arg
else $value
} ;
let $in-xml := <prices>
<price value="29.99" discount="10.00"/>
<price value="39.99" discount="6.00"/>
<price value="69.99"/>
<price value="49.99" discount=""/>
</prices>
return (data(functx:if-absent(
$in-xml//price[1]/@discount, 0)), data(functx:if-absent(
$in-xml//price[3]/@discount, 0)), data(functx:if-absent(
$in-xml//price[4]/@discount, 0)))
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