[xsl] read array

Subject: [xsl] read array
From: henry human <henry_human@xxxxxxxx>
Date: Wed, 21 Dec 2011 10:33:01 +0000 (GMT)
Ther are two elements "ID" in the xml
I will read them and concat together:
<xsl:for-each select="root/Invoice/DocumentReference/ID">
...........
</xsl:for-each>
Concat([1].ID + [2].ID 

???
Thanks

Current Thread