That was the problem. Thank you very much Martin. I appreciate the quick
response.

-----Original Message-----
From: Martin Honnen martin.honnen@xxxxxx
<xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Sent: Tuesday, March 29, 2022 5:13 PM
To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
Subject: Re:  Grouping problem


Am 29.03.2022 um 23:01 schrieb rick@xxxxxxxxxxxxxx:
> <xsl:for-each-group select="pgf" group-starting-with="@level[.='1']">


Use

   group-starting-with="pgf[@level = 1]"

the same change (i.e. to write pattern to match on the pgf elements in the
grouping population) needs to be applied to your further grouping of the other
levels