OT: European abbreviations "./."

SET Off_Topic_Warning = ON

Can anyone here tell me what the Europeans (Germans, in
this case) mean when they type:

./.

I've seen it in spreadsheets, and it seems to indicate
either Not Applicable, or Data Not Available.

Thanks

SET Off_Topic_Warning = OFF

€ver seen before, maybe some own.

Never seen this in belgium too !

Kind Regards,
Stef