What about
<xsl:template match="incoming">
<outgoing name="{(_at_)name}"
index="{count(preceding-sibling::*[not(@size)]) + 1 +
sum(preceding-sibling::*/@size)}"></outgoing>
</xsl:template>
Sure, you can do that, but it's likely to be O(n^2).
Michael Kay
http://www.saxonica.com/
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