I have the below XML which contains all the elements in lowercase.
<data>
    <employee>
        <id>2784</id>
        <employeeFirstName></employeeFirstName>
        <employeeLastName nil="true"/></employeeLastName>
    </employee>
</data>
Here my requirement is to convert all the elements to uppercase.
<DATA>
        <EMPLOYEE>
            <ID>2784</ID>
            <EMPLOYEEFIRSTNAME></EMPLOYEEFIRSTNAME>
            <EMPLOYEELASTNAME nil="true"/></EMPLOYEELASTNAME>
        </EMPLOYEE>
</DATA>
Anyone please help me to convert this xml using XSLT.