$uppercase(expr) returns the uppercase value of the argument, which must be a field reference or an expression that evaluates to a string
For example, if the value of ${name} is “Fred”, then the following expression will return “FRED”:
$uppercase(${name})
If the value of the ${partno}:${location} is “p1234-56-c:SJC”, the following expression will return “P1234-56-C:SJC”:
$uppercase(${partno}:${location})