> I need to have that the number of groups is 3.

which is the number of things selected by
    <xsl:for-each select="product[count(. | key('hotelname', name)[1]) = 1]">

so

    <xsl:variable name="grps" select="product[count(. | key('hotelname', name)[1]) = 1]">

no of groups is <xsl:value-of select="count($grps)"/>
   <xsl:each select="$grps">
   ....

or, if you only need the number withing the for-each you don't need to
count you can use last() like:


    <xsl:for-each select="product[count(. | key('hotelname', name)[1]) = 1]">
group <xsl:value-of select="position()"/> out of <xsl:value-of select="last()"/>
...

David

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