plus
Description: Adds a numeric value to the Subject. If
either the argument or the Subject cannot be coerced into a Number, returns
null.
Subject Type: Number or Decimal
Arguments:
Operand : The value to add to the Subject
Return Type: Number or Decimal (depending on input types)
Examples: If the "fileSize" attribute has a
value of 100, then the Expression ${fileSize:plus(1000)} will return
the value 1100.