The SFL keyword is supported. However, it is limited in that all of the
related subfile keywords are not yet fully supported. See each of the individual
subfile keywords for any additional limitations.Note: WebFacing
subfile implementation causes some differences in behavior between a 5250
application and a WebFacing application. The 5250 handles the subfile control
record and subfile as separate entities, either of which can be overlapped.
WebFacing handles them as one entity, which results in the subfile control
record and subfile being removed if one of them is overlapped by other records