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On Mon, Nov 29, 2010 at 5:34 PM, Denenberg, Ray <[log in to unmask]> wrote:
> (second of two messages)
>
> unknown/questionable/uncertain/approximate
>
> These all have distinct meanings.
>
> unknown
> It means just that, "unknown". So for 199u, the 'u' may be replaced by any single digit.
> [Note: we have not settled on 'u' as the "unknown" character. We just haven't found a  better one yet.]
>
> uncertain
> it means "known to be one of a set".  So 2004-[01,02,03] means "January, February, or march of 2004, we don't know which but we know it's one of those".
>
> questionable
> A strict value, but this value may be wrong.   2004-06? means "it may be June 2004, but then, it might not."
>
> approximate
> It means just that, "approximate".

I don't understand the last one. Can we spell it out more fully?

Bruce