What is the correct sign for ";" in morse?
FLdigi converts "-.-.-." to ";" whereas in various code lookup tables I see "-.-.-"
Can both be used or is one of the morse codes valid?
As far as I understand in "International Morse Code" the '-.-.-
' is used as "Attention" or "start of message". Reference here
Based on a short search, it seems that '-.-.-.
' is commonly accepted as semicolon in "International Morse Code", and is likely correct. The Wiki article seems to suggest the same, but is hardly authoritative without further reference.
I have not found an official publication for this, as the ITU-R document referenced does not mention this character.
Even section 3 "Transmission of signs for which there is no corresponding signal in the Morse code" does not suggest an alternative code.
You might have stumbled on a "not formally defined, but has a common practice", in which case I would choose '-.-.-.
' as your most likely candidate, as '-.-.-
' has an ITU-R definition.
[EDIT] I just found a duplicate question on this site, here