Hi Folks,

I have an XSLT program that locates all leaf elements which have the string

     <xsl:template match="/">
         <results>
             <xsl:for-each select="//*[not(*)][. eq 'DNKK']">
                 <result>
                     <xsl:sequence select="."/>
                     <parent><xsl:value-of select="name(..)"/></parent>
                 </result>
             </xsl:for-each>
         </results>
     </xsl:template>

The input XML document is large, nearly 5GB.

When I run my program SAXON throws the OutOfMemoryError message shown

To solve the OutOfMemoryError I could add to my heap space (-Xmx) when I

invoke Java. But I wonder if there a way to write my program so that it is
more efficient (i.e., doesn't require so much memory)?

Saxon EE is the only XSLT 3 processor implementing streaming so there
you could try

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
B  version="3.0"
B  xmlns:xs="http://www.w3.org/2001/XMLSchema"
B  exclude-result-prefixes="#all"
B  expand-text="yes">

B  <xsl:mode streamable="yes" on-no-match="shallow-skip"
use-accumulators="#all"/>

B  <xsl:accumulator name="string-value" as="xs:string?"
initial-value="()" streamable="yes">
B B B  <xsl:accumulator-rule match="*" select="()"/>
B B B  <xsl:accumulator-rule match="text()" select="$value || ."/>
B  </xsl:accumulator>

B  <xsl:template match="*">
B B B  <xsl:apply-templates/>
B B B  <xsl:variable name="string-value"
select="accumulator-after('string-value')"/>
B B B  <xsl:if test="not(empty($string-value)) and $string-value =
$search-term">
B B B B B B  <result>
B B B B B B B B  <xsl:copy>{$string-value}</xsl:copy>
B B B B B B B B  <parent>{node-name(..)}</parent>
B B B B B B  </result>
B B B  </xsl:if>
B  </xsl:template>