[xsl] embed Base64 content into xml element

Subject: [xsl] embed Base64 content into xml element
From: Suresh <suresh.chinta@xxxxxxxxx>
Date: Fri, 9 Apr 2010 14:50:47 -0400
I have some content in base64 format in a text file. How can I embed
the base64 content into xml file.

For example :

base64 text file:
------------------------
RGVwbG95bWVudFx0ZW1wXE1vZGlmaW

Required output in XML File:
-----------------------------------------

<env:Envelope xmlns:env="http://schemas.xmlsoap.org/soap/envelope/";>
            <env:Body>
                <dp:request
xmlns:dp="http://www.datapower.com/schemas/management";>
                    <dp:file> CONTENT FROM BASE64 TEXT FILE </dp:file>
                </dp:request>
            </env:Body>
</env:Envelope>

How can I write XSLT?

Thanks.

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