Re: [xsl] [Accumulators] Another stupid question

["B Tommie Usdin btusdin@xxxxxxxxxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

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In this case, for example, you might have used: Why is one accumulator used
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-- Tommie


> On Oct 6, 2020, at 4:57 PM, Christophe Marchand cmarchand@xxxxxxxxxx
<xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> Hello !
>
> I have another question with accumulators. I use accumulators to calculate
block height, and then to calculate block locations (y).
>
> I have this XSL for a repro...
>
> <?xml version="1.0" encoding="UTF-8"?>
> <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
>   xmlns:xs="http://www.w3.org/2001/XMLSchema";
>   xmlns:private="top:marchand"
>   exclude-result-prefixes="#all"
>   version="3.0">
>
>   <xsl:output method="xml" indent="true"/>
>
>   <xsl:mode on-no-match="shallow-copy" use-accumulators="#all"/>
>
>   <xsl:accumulator name="blockHeight" as="xs:double" initial-value="0.0">
>     <xsl:accumulator-rule match="page">
>       <xsl:message>Reset block height to 3.2</xsl:message>
>       <xsl:sequence select="3.2"/>
>     </xsl:accumulator-rule>
>     <xsl:accumulator-rule match="private:block">
>       <xsl:message>Adding block height {@id} : {@height}</xsl:message>
>       <xsl:sequence select="$value + xs:double(@height)"/>
>     </xsl:accumulator-rule>
>   </xsl:accumulator>
>
>   <xsl:template match="block">
>     <xsl:variable name="height" as="xs:double" select="3.5"/>
>     <!-- produce some output -->
>     <xsl:variable name="TempTree" as="element(private:block)">
>       <private:block height="{$height}"/>
>     </xsl:variable>
>     <xsl:apply-templates select="$TempTree"/>
>     <xsl:copy>
>       <xsl:attribute name="y" select="accumulator-after('blockHeight')"/>
>       <xsl:apply-templates select="node() | @*"/>
>     </xsl:copy>
>   </xsl:template>
>
>   <xsl:template match="private:block">
>     <xsl:message>private:block matched</xsl:message>
>   </xsl:template>
>
>   <xsl:template name="xsl:initial-template">
>     <xsl:variable name="content" as="document-node()">
>       <xsl:document>
>         <doc>
>           <page id="p1">
>             <block id="b1">
>               <!-- arbitrary content -->
>             </block>
>             <block id="b2">
>               <!-- another arbitrary content -->
>             </block>
>           </page>
>           <page id="p2">
>             <block id="b3">
>               <!-- arbitrary content -->
>             </block>
>             <block id="b4">
>               <!-- another arbitrary content -->
>             </block>
>           </page>
>         </doc>
>       </xsl:document>
>     </xsl:variable>
>     <xsl:apply-templates select="$content"/>
>   </xsl:template>
> </xsl:stylesheet>
>
> When I run this XSL on the sample XML, I have messages displayed : "Reset
block height to 3.2", "private:block matched", but never the "Adding block
height..."
>
> According to specification [1], I expect private:block matches accumulator
rule, and accumulator value being augmented by block/@height.
>
> What am I doing wrong ?
>
> Thanks in advance,
> Christophe
>
> [1] : 18.2.2 https://www.w3.org/TR/xslt-30/#applicability-of-accumulators
list item 1
>

======================================================================
B. Tommie Usdin
mailto:btusdin@xxxxxxxxxxxxxxxx
Mulberry Technologies, Inc.
https://www.mulberrytech.com
17 West Jefferson Street
Phone: 301/315-9631
Suite 207
Direct Line: 301/315-9634
Rockville, MD  20850
Fax: 301/315-8285
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