FunctX XSLT Functions

FunctX XSLT Function Library > XML Nodes > Document Order >

functx:follows-not-descendant

Whether an XML node follows another without being its descendant

Description

The functx:follows-not-descendant function returns a boolean value indicating whether $a follows $b without being its descendant. If either argument is the empty sequence the function returns false.

Arguments and Return Type

Name	Type	Description
`$a`	`node()?`	the first node
`$b`	`node()?`	the second node
return value	`xs:boolean`

XSLT Function Declaration

See XQuery definition.

<xsl:function name="functx:follows-not-descendant" as="xs:boolean"
              xmlns:functx="http://www.functx.com">
  <xsl:param name="a" as="node()?"/>
  <xsl:param name="b" as="node()?"/>

  <xsl:sequence select="
   $a >> $b and empty($b intersect $a/ancestor::node())
 "/>

</xsl:function>

Examples

<xsl:variable name="in-xml" as="item()*">

<authors>
   <author>
      <fName>Kate</fName>
      <lName>Jones</lName>
   </author>
   <author>
      <fName>John</fName>
      <lName>Doe</lName>
   </author>
</authors>

</xsl:variable>

XPath Example

Results

functx:follows-not-descendant(
     $in-xml//author[2],$in-xml//author[1])

true

functx:follows-not-descendant(
     $in-xml//author[1]/fName,
     $in-xml//author[1])

false

functx:follows-not-descendant(
     $in-xml//author[1],$in-xml//author[2])

false

History

Published On	Last Updated	Contributor(s)
2006-06-27	2007-02-26	W3C XML Query Working Group, XQuery 1.0: An XML Query Language, http://www.w3.org/TR/xquery/(name was changed from follows to follows-not-descendant for clarity)

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