Is it possible to use regular expression to assign 1000 zeros or spaces to a variable?

It's for padding using the following
<xsl:value-of select="substring( concat(Element2Pad,$Spaces) , 1, 500 )"/>

Thank you in advance.

I'm not sure how you would expect a regular expression to help with this.

In XSLT 2.0 you can write

<xsl:variable name="$spaces" select="
  string-join(for $i in 1 to 1000 return ' ', '')"/>

In 1.0 you can do

<xsl:template name="replicate">
  <xsl:param name="s"/>
  <xsl:param name="i"/>
  <xsl:for-each select="(//node())[position() &lt;= $i]">
    <xsl:value-of select="$s"/>
  </xsl:for-each>
</xsl:template>

<xsl:variable name="spaces">
  <xsl:call-template name="replicate">
    <xsl:with-param name="s" select="' '"/>
    <xsl:with-param name="i" select="50"/>
  </xsl:call-template>
</xsl:variable>

Michael Kay
http://www.saxonica.com/
Author, XSLT Programmer's Reference and XPath 2.0 Programmer's Reference

Hi MhKay,

Thank you for the solution. The code you provided works beautifully and more elegant than <xsl:variable name="Spaces" select="' ...'"/>

Again string-join(for $i in 1 to 1000 return 'Thank you '.
;)