Xml: Werte mit xsl dividieren

#Pfad zur XML
$xmlfile = 'c:\temp\smartmeter.xml'   
$xml = New-Object XML
# XML laden
$xml.Load($xmlfile)
# Namespace Manager für verwendeten Namespace in der XML (Bitte anpassen)
[System.Xml.XmlNamespaceManager]$nsm = New-Object System.Xml.XmlNamespaceManager $xml.NameTable
$nsm.AddNamespace('smart','http://www.abcde')  
# Nodes selektieren
$nodes = $xml.SelectNodes("//smart:value",$nsm)  
# für jeden Node
$nodes | %{$_.innerText = [int32]$_.innerText / 1000}
# speichern
$xml.Save($xmlfile)

<?xml version="1.0" encoding="UTF-8"?>  
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:smart="http://www.abcde">  
	<xsl:output method="xml" encoding="UTF-8" indent="yes"/>  
	<xsl:template match="/smart:measuringdata">  
		<smart:measuringdata>
			<xsl:for-each select="smart:data">  
				<smart:data>
					<xsl:for-each select="@smart:id">  
						<xsl:attribute name="smart:id">  
							<xsl:value-of select="."/>  
						</xsl:attribute>
					</xsl:for-each>
					<xsl:for-each select="@smart:series">  
						<xsl:attribute name="smart:series">  
							<xsl:value-of select="."/>  
						</xsl:attribute>
					</xsl:for-each>
					<xsl:for-each select="@smart:unit">  
						<xsl:attribute name="smart:unit">  
							<xsl:value-of select="."/>  
						</xsl:attribute>
					</xsl:for-each>
					<xsl:for-each select="smart:value">  
						<smart:value>
							<xsl:for-each select="@smart:date">  
								<xsl:attribute name="date">  
									<xsl:value-of select="."/>  
								</xsl:attribute>
							</xsl:for-each>
							<xsl:value-of select="(.) div (1000)"/>  
						</smart:value>
					</xsl:for-each>
				</smart:data>
			</xsl:for-each>
		</smart:measuringdata>
	</xsl:template>
</xsl:stylesheet>

<?xml version="1.0" encoding="UTF-8"?>  
<smart:measuringdata xmlns:smart="http://www.abcde">  
   <smart:data smart:id="DE123456789" smart:series="Entnahme" smart:unit="KWh">  
      <smart:value date="2015-04-15T00:15:00+01:00">0.125</smart:value>  
      <smart:value date="2015-04-15T00:30:00+01:00">0.124</smart:value>  
      <smart:value date="2015-04-15T00:45:00+01:00">0.128</smart:value>  
      <smart:value date="2015-04-15T01:00:00+01:00">0.144</smart:value>  
      <smart:value date="2015-04-15T01:15:00+01:00">0.123</smart:value>  
      <smart:value date="2015-04-15T01:30:00+01:00">0.125</smart:value>  
      <smart:value date="2015-04-15T01:45:00+01:00">0.152</smart:value>  
      <smart:value date="2015-04-15T02:00:00+01:00">0.104</smart:value>  
      <smart:value date="2015-04-15T02:15:00+01:00">0.112</smart:value>  
   </smart:data>
</smart:measuringdata>