The system-missing value is always recoded into the system-missing
variable in target variables.
+If a source value has a value label, then that value label is retained
+for the new value in the target variable. Otherwise, the source value
+itself becomes each new value's label.
+
@subcmd{PRINT} is currently ignored.
The @subcmd{GROUP} subcommand is relevant only if more than one variable is to be