CSV instead of white-space

Appreciate any help on this one. Looked for a long time in the archives but
can't get it right.........

I'm trying to create a CSV TXT file from an XML and have the following XSL.
There's a large hierarchy of elements under the "Vertrag" element and I'm
trying not to have to select them individually as the structure may change.
My select statement works and I get all the values with at least 1
whitespace between elements.

Is there a way to either replace the whitespace with a ";" or to concat a
";" onto my selection ?

<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
        <xsl:template match="Vertrag">
                        <xsl:value-of select="(.)"/>
                <xsl:text>&#13;</xsl:text>
        </xsl:template>
</xsl:stylesheet>


Thanks in advance for any help

- Robin

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