ADIF Export question

[aa5sh]

I have an issue when exporting my log to import into SmartSDR for MacOS, it doesn't appear to properly handle the ADIF data type flags properly ('N','D','T'). I notice you add them for Freq, Time_On, Time_off, qso_date, iso_date_off. I know it is in the spec but it seems to not be handled properly by that app and I want to say I had issue with RumLogNG but not 100% on that . Since they were not consistent with all the dates, times or numbers I just was unsure why they were there for these 5 fields.

[foldynl]

It's for historical reasons, copied from the original code. I think it has no significance being there.