In this post an XSLT function that can be used to right-pad the value of an element with a chosen character to a certain length. No rocket science but this might become handy again so by putting it down here I don’t have to reinvent it later. The function itself looks like:
 
 
 
 
 
 
 

<xsl:stylesheet version="2.0" xmlns:functx="http://my/functions"
 xmlns:xsd="http://www.w3.org/2001/XMLSchema"
 xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

 <xsl:function name="functx:pad-string-to-length" as="xsd:string">
 <xsl:param name="stringToPad" as="xsd:string?"/>
 <xsl:param name="padChar" as="xsd:string"/>
 <xsl:param name="length" as="xsd:integer"/>
 <xsl:sequence select="
 substring(
 string-join (
 ($stringToPad, for $i in (1 to $length) return $padChar)
 ,'')
 ,1,$length)
"/>
 </xsl:function>

</xsl:stylesheet>

And with this function available you can use it like:

<xsl:template match="/">
 <xsl:value-of select="functx:pad-string-to-length(//short_value, '0', 12)" />
 </xsl:template>

The input XML like:

<test>
 <short_value>123</short_value>
</test>

will give as a result in this case:
123000000000
By the way, this function only works with XSLT2!