Get the total number of nodes and counting nodes
If you want to count the node of you XML you could use count(object/node) and it will be something like this:
<xsl:value-of select="count(/root/*)"/>
The instruction above will let you know how many child nodes does your root node has
<xsl:for-each select="/root/element-you-wanna-loop" > <!-- Do something with your nodes here --> </xsl:for-each>
Hope this helps you.