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(:**************************************************************:)
(: Test: functx-functx-distinct-nodes-2 :)
(: Written by: Priscilla Walmsley (Frans Englich is maintainer) :)
(: Date: 2008-05-16+02:00 :)
(:**************************************************************:)
declare namespace functx = "http://www.example.com/";
(:~
: The distinct XML nodes in a sequence (by node identity)
:
: @author Priscilla Walmsley, Datypic
: @version 1.0
: @see http://www.xqueryfunctions.com/xq/functx_distinct-nodes.html
: @param $nodes the node sequence
:)
declare function functx:distinct-nodes
( $nodes as node()* ) as node()* {
for $seq in (1 to count($nodes))
return $nodes[$seq][not(functx:is-node-in-sequence(
.,$nodes[position() < $seq]))]
} ;
(:~
: Whether an XML node is in a sequence, based on node identity
:
: @author Priscilla Walmsley, Datypic
: @version 1.0
: @see http://www.xqueryfunctions.com/xq/functx_is-node-in-sequence.html
: @param $node the node to test
: @param $seq the sequence of nodes to search
:)
declare function functx:is-node-in-sequence
( $node as node()? ,
$seq as node()* ) as xs:boolean {
some $nodeInSeq in $seq satisfies $nodeInSeq is $node
} ;
let $in-xml := <test>
<child>1</child>
<child>2</child>
<child>3</child>
<child>3</child>
</test>
return (functx:distinct-nodes(
($in-xml/child[3], $in-xml/*) ))
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