Note that whenever you have a construct like
[(_at_)id=current()/@pr_id]
"use a key" should pop automatically in to your head.
Something like
<xsl:key name="goods" match="goods" use="@name"/>
<xsl:for-each-group select="product" group-by="@pr_id">
<xsl:sort select="key('goods',@pr_id,$goods)/@name"/>
Conversely you don't need this key:
<xsl:copy-of select="key('prd', current-grouping-key())"/>
as that is just
<xsl:copy-of select="current-group()"/>
David
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