Fields - Formats (alphanumeric)

If no format is specified for alphanumeric fields, data is output precisely as input, the number of characters equalling the field size.

l or L

Folds the characters A-Z to lower case on input.

u or U

Folds the characters a-z to upper case on input.

These format characters have no effect on assignment to a field. The treatment on assignment is handled by flags.