Re: [xsl] Is this a grouping task?

Subject: Re: [xsl] Is this a grouping task?
From: "Martin Honnen martin.honnen@xxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Date: Tue, 22 Oct 2019 19:09:59 -0000
On 22.10.2019 20:41, Martin Honnen martin.honnen@xxxxxx wrote:
On 22.10.2019 20:07, Rick Quatro rick@xxxxxxxxxxxxxx wrote:

I am using XSLT 2 and think this may require a for-each-group solution.
Any advice would be appreciated. Thank you very much.

As an alternative, if you can move to XSLT 3, then I think it is also easy with "xsl:iterate":

Thinking about it again, it seems in XSLT 3 simply using an accumulator makes it even more easy and compact:

<xsl:stylesheet xmlns:xsl="";

    <xsl:mode on-no-match="shallow-copy" streamable="yes"

    <xsl:accumulator name="rev-change" as="xs:boolean"
initial-value="false()" streamable="yes">
        <xsl:accumulator-rule match="topic" select="false()"/>
        <xsl:accumulator-rule match="topic/revst" select="true()"/>
        <xsl:accumulator-rule match="topic/revend" select="false()"/>

    <xsl:template match="topic/*[accumulator-before('rev-change')]">
            <xsl:attribute name="rev">changed</xsl:attribute>
            <xsl:apply-templates select="@*"/>

<xsl:template match="revst | revend" priority="2"/>


Saxon EE however doesn't like it for streaming and crashes, works fine
however with HE or with EE and streaming turned off.

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