Hi,

I am not used to do XSLT 2.0.

While the Pattern of a xsl:key has more options in 2.0 than in XLST 1.0
http://www.w3.org/TR/xpath20/#prod-xpath-KindTest

it seems not to allow to match a sequence.

Is it possible to "store" a sequence in a node?

I tried
    <xsl:variable name="s">
      <xsl:sequence select="for $v in 1 to 10 return $v"/>
    </xsl:variable>
but then $s is considered as string "1 2 3 4 5 6 7 8 9 10" and not as
sequence.

In case you could store a sequence in a node (how?) you could have
a variable holding all sequences in nodes like this (in $seqs):

<xsl:variable name="seqs"><seq>(1,2,3)</seq><seq>(4,5,6)</seq><seq>
(7,8,9)</seq></xsl:variable>