Discuss and implement no-value placeholder i.e. -9999 v.s. NA

[whyvez]

No description provided.

[jo-tham]

I think the best thing to do for no data is to have an empty csv field

0,,2,3

AFAIK this is a standard

that way a character field, with a literal 'NA' for, say, North America, is not interpreted as missing.
-9999 is also a possible value for an observation.

`,,' is literally no-value