Description
The functx:is-node-in-sequence function returns a boolean value indicating whether or not a node is in the specified sequence, based on node identity. It does not identify nodes that are descendants of nodes in the sequence; see functx:is-node-among-descendants for that purpose. If $node or $seq is the empty sequence, it returns false.
Nodes are identified based on node identity, not their contents. For a similar function based on the contents of a node, see functx:is-node-in-sequence-deep-equal.
Arguments and Return Type| Name | Type | Description |
|---|
$node |
node()? |
the node to test |
$seq |
node()* |
the sequence of nodes to search |
| return value |
xs:boolean |
XQuery Function Declaration| See XSLT definition. | | XQuery Syntax for July 2004 - January 2007 (1.0): |
|---|
declare namespace functx = "http://www.functx.com";
declare function functx:is-node-in-sequence
( $node as node()? ,
$seq as node()* ) as xs:boolean {
some $nodeInSeq in $seq satisfies $nodeInSeq is $node
} ; | | XQuery Syntax for May 2003: |
|---|
declare namespace functx = "http://www.functx.com"
define function is-node-in-sequence
( $node as node()? ,
$seq as node()* ) as xs:boolean {
some $nodeInSeq in $seq satisfies $nodeInSeq is $node
} |
Exampleslet $in-xml := | <prices>
<price value="29.99" discount="10.00"/>
<price value="39.99" discount="6.00"/>
<price value="49.99" discount=""/>
</prices> | let $aPrice := | <price value="49.99" discount=""/> | return |
| XQuery Example | Results |
|---|
functx:is-node-in-sequence(
$in-xml/price[1],$in-xml/price)
|
true
|
functx:is-node-in-sequence(
$in-xml/price[1],$in-xml)
|
false
|
functx:is-node-in-sequence(
$aPrice,$in-xml/price)
|
false
|
See AlsoHistory |
|
