Hi John and all:

For sure its a good idea to preserve the CF Conventions attribute if it exists. I will add that to our issue tracker.

Remember that THREDDS is a general purpose subsetter, not specific to CF. So we deal with lots of source datasets (eg GRIB) that arent CF. The point is that we convert whatever we have to CF.

Up to this point, as CF versions have evolved, there hasnt been any difference in the way that we write out these files. So im interested if Ive missed something and there is some actual change in the file structure that we should be tracking from Sean's POV. Other than the actual version number.

John


On 8/28/2013 11:11 AM, John Graybeal wrote:
It isn't just about feature presentation, right?  On the assumption that the 
latest version is always most current (so everyone will use the latest version 
if they can), I use the version as a proxy for how 
current/up-to-date/sophisticated the data provider is.

It also gives me a clue about which standard name table version they might use, 
though that version info is often available elsewhere.

If true, this may help explain why so few data providers seemed to be using 
1.6, anyway....

John

On Aug 28, 2013, at 08:56, John Caron <ca...@unidata.ucar.edu> wrote:

Hi Sean:

What feature of CF are you using that you need to preserve the version?

John

"If you torture data long enough, it will confess."
  -- Economist Ronald Coase



On 8/28/2013 3:28 AM, Gaffney, Sean P. wrote:
Hi,
Here at the British Oceanographic Data Centre we use THREDDS to deliver
and subset our numerical model data that we hold in CF netcdf format.
I’ve just been made aware that during the delivery and subsetting
process, THREDDS seems to be converting the CF files we hold from
whatever CF convention they have been supplied in, to CF 1.0.
Is this something that the rest of the community are aware of, and if
so, do people consider it to be of major importance that the files
outputted by thredds are in a different convention to the source files
thredds interrogates?
Cheers
Sean Gaffney
BODC

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