<xsl:variable name="smallcase" select="'abcdefghijklmnopqrstuvwxyz'" />
   <xsl:variable name="uppercase" select="'ABCDEFGHIJKLMNOPQRSTUVWXYZ'" />

   <xsl:template match="/">
      <xsl:value-of select="translate(doc, $smallcase, $uppercase)" />
   </xsl:template>

If you are using XSLT 2.0, then you can use XPath function "upper-case"
(http://www.w3.org/TR/xpath-functions/#func-upper-case)

Hi,

Is there a way to convert a string to upper case? For example, given the
string testString, the output should be TESTSTRING.

Sample Input

<?xml version="1.0"?>
<doc>testString</doc>

Sample Output

TESTSTRING

Thanks & Regards,
Ambika Prasad Das

--
Regards,
Mukul Gandhi