[CF-metadata] Add new integer types to CF?

Jim Biard jbiard at cicsnc.org
Fri Sep 22 08:45:50 MDT 2017


I like the "redundant" sentence. I like the _Unsigned idea, but there 
are lots of old files "in the wild" that don't have that attribute.

This raises another question in my mind. To what extent does the current 
version of the document need to give homage to old usages? If your file 
says it uses CF 1.5, I wouldn't expect it to follow CF 1.7. So does the 
CF 1.7 or 1.8 document need to contain "grandfather" language (things 
that used to be, or not be, but that are different in the current version)?

Grace and peace,

Jim

On 9/22/17 7:49 AM, Signell, Richard wrote:
> lookin at the NUG, how about saying:
>
> In file types that don't offer native support for unsigned types,
> integer or byte variables that are to be interpreted as unsigned must
> have the attribute _Unsigned = "true".
>
> On Fri, Sep 22, 2017 at 1:10 AM, Chris Barker <chris.barker at noaa.gov 
> <mailto:chris.barker at noaa.gov>> wrote:
>
>     LGTM.
>
>         "One byte numeric data should be stored using the byte
>
>         or unsigned byte data type."
>
>         It too is copied from CF 1.7, and I think its intent was to tell
>         people to store 1-byte numeric data as type byte not type char.
>         With that rationale, if the sentence was in 1.7 then
>         it should probably be in 1.8,
>
>
>     yup --it's clear to me, and not annoyingly redundant.
>
>     The truth is that char type IS used a lot on old C code for
>     numeric data.
>
>     -CHB
>
>         although I'll go with
>         the consensus.
>
>         -- 
>         Charlie Zender, Earth System Sci. & Computer Sci.
>         University of California, Irvine 949-891-2429
>         <tel:949-891-2429> )'(
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>
>
>     -- 
>
>     Christopher Barker, Ph.D.
>     Oceanographer
>
>     Emergency Response Division
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> -- 
> Dr. Richard P. Signell   (508) 457-2229
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