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