Re: [xsl] Grouping

["Christoph Naber pentium120mhz@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

Thank you Martin!

This is the perfect solution for the overall stylesheet. Even if it's 
not as readable as the solution with a function, it requires no 
knowledge about the special grouping logic when applying templates 
somewhere in the rest of the stylesheet.

And it's _way_ more understandable than the stuff I came up with.

Wish you a good evening.

Best regards

Christoph

Am 21.10.2020 um 18:38 schrieb Martin Honnen martin.honnen@xxxxxx:
> Am 21.10.2020 um 17:57 schrieb Christoph Naber pentium120mhz@xxxxxxxxx:
>
> > 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";
> B B B B xmlns:xs="http://www.w3.org/2001/XMLSchema";
> B B B B exclude-result-prefixes="#all"
> B B B B version="3.0">
>
> B  <xsl:key name="point-group"
> B B B B B B B B B B  match="point[@type = 1 and
> preceding-sibling::*[1][self::point[@type = 1]]]"
> B B B B B B B B B B  use="generate-id(preceding-sibling::point[@type =
> 1][not(preceding-sibling::*[1][self::point[@type = 1]])][1])"/>
>
> B  <xsl:mode on-no-match="shallow-copy"/>
>
> B  <xsl:output method="xml" indent="yes"/>
>
> B  <xsl:template match="point[@type =
> 1][not(preceding-sibling::*[1][self::point[@type = 1]])]">
> B B B B B  <group>
> B B B B B B B B B  <xsl:copy-of select="., key('point-group', generate-id())"/>
> B B B B B  </group>
> B  </xsl:template>
>
> B  <xsl:template match="point[@type = 1 and
> preceding-sibling::*[1][self::point[@type = 1]]]"/>
>
> </xsl:stylesheet>