Re: [xsl] streaming XSLT creating a header from a first record

["Geert Bormans geert@xxxxxxxxxxxxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

Yeah, that just did it,
it also seems pretty flexible regarding which row exactly I want to put in the
header
really cool, bit frustrating it appeared to be so simple in the end
thanks a lot for your help

Best regards,

Geert Bormans

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----- Oorspronkelijk bericht -----
Van: "Abel Braaksma, (Exselt) abel@xxxxxxxxxx"
<xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Aan: "xsl-list" <xsl-list@xxxxxxxxxxxxxxxxxxxxxx>
Verzonden: Dinsdag 15 mei 2018 16:54:19
Onderwerp: Re: [xsl] streaming XSLT creating a header from a first record

On 15.05.2018 15:18, Geert Bormans geert@xxxxxxxxxxxxxxxxxxx wrote:
> still trying to get my head around this and facing obstacles,
> most likely by lack of understanding... however
>
> example in
>
> <table>
>      <row id="row1" attr1="A" attr2="AA"/>
>      <row id="row2"  attr1="C" attr2="CC"/>
>      <row id="row3"  attr1="D" attr2="DD"/>
> </table>
>
> example out
>
> <document>
>      <header>
>          <!-- process first row here -->
>          <id>row1</id>
>          <attr1>A</attr1>
>          <attr2>AA</attr2>
>      </header>
>      <content>
>          <!-- process all including first row here -->
>          <row id="row1" attr1="A" attr2="AA"/>
>          <row id="row2" attr1="C" attr2="CC"/>
>          <row id="row3" attr1="D" attr2="DD"/>
>      </content>
> </document>
>
>
> Using the accumulator or the xsl:iterate approach allows me to process the
header row twice
> but I can't seem to figure out to create the header and then continue the
iteration in a different construct
> it seems I need the header always before the iterator has started

That seems like a job for xsl:fork

<?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:math="http://www.w3.org/2005/xpath-functions/math";
	exclude-result-prefixes="xs math"
	version="3.0">

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

	<xsl:mode name="header" streamable="yes"/>

	<xsl:output indent="yes"/>

	<xsl:template match="table">
		<document>
			<xsl:fork>
				<xsl:sequence>
					<header>
						<xsl:apply-templates select="row[1]/@*" mode="header"/>
					</header>
				</xsl:sequence>
				<xsl:sequence>
					<content>
						<xsl:apply-templates select="row"/>
					</content>
				</xsl:sequence>
			</xsl:fork>
		</document>
	</xsl:template>

	<xsl:template match="row/@*" mode="header" expand-text="yes">
		<xsl:element name="{name()}">{.}</xsl:element>
	</xsl:template>

</xsl:stylesheet>