FunctX XSLT Function Library > Sequences > Checking Contents >

functx:is-node-in-sequence

Whether an XML node is in a sequence, based on node identity

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

XSLT Function Declaration

<xsl:function name="functx:is-node-in-sequence" as="xs:boolean"
              xmlns:functx="http://www.functx.com">
  <xsl:param name="node" as="node()?"/>
  <xsl:param name="seq" as="node()*"/>

  <xsl:sequence select="
   some $nodeInSeq in $seq satisfies $nodeInSeq is $node
 "/>

</xsl:function>

Examples

<prices>
   <price value="29.99" discount="10.00"/>
   <price value="39.99" discount="6.00"/>
   <price value="49.99" discount=""/>
</prices>

<price value="49.99" discount=""/>

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 Also

History