Re: Grouping

Am 21.10.2020 um 17:57 schrieb Christoph Naber [email protected]:

> The group-wrap should be performed for sequences of <points> of @type =
> '1'. <Points> of other types and completeley other nodes should not be
> grouped.


Another approach not using grouping with for-each-group is trying to key
on the generated id of the first node in the group; usually that leads
to patterns that make my head spin but so did your original code:

<?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"
	exclude-result-prefixes="#all"
	version="3.0">

   <xsl:key name="point-group"
            match="point[@type = 1 and
preceding-sibling::*[1][self::point[@type = 1]]]"
            use="generate-id(preceding-sibling::point[@type =
1][not(preceding-sibling::*[1][self::point[@type = 1]])][1])"/>

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

   <xsl:output method="xml" indent="yes"/>

   <xsl:template match="point[@type =
1][not(preceding-sibling::*[1][self::point[@type = 1]])]">
       <group>
           <xsl:copy-of select="., key('point-group', generate-id())"/>
       </group>
   </xsl:template>

   <xsl:template match="point[@type = 1 and
preceding-sibling::*[1][self::point[@type = 1]]]"/>

</xsl:stylesheet>
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