[xsl] Numbering: position() ?

[Sven Waibel <sven.waibel@xxxxxxxx>]

Hi,

i got following xml:

<book id="1">
	<page>
	<special>
		<page>
		<page>
	</special>	
	<page>
	<page>
</book>

xslt:


<xsl:template match="page">
	<xsl:value-of select="concat(concat(ancestor::book/$id, '.'),
position())"/>
</xsl:template>

I got this numbering:
1.1
1.1
1.2
1.3
1.4

How can i achieve that the numbering is correct?

Thanks
Sven