I've converted an athena dataset to GDF/'yt data format'. It is currently readable by my fork of yt and functional (outside of some ghost zone issues), and I expect to push my changes to the main yt development branch soon. If you want to download this and take a look at the layout of the hdf5 file during our meeting, feel free (65MB file):

On Mon, Sep 26, 2011 at 2:12 PM, Matthew Turk <matthewturk@gmail.com> wrote:

Hi all,

Casey, Cameron, Sam and I are going to be meeting -- likely utilizing
"Google Hangouts" -- to discuss the grid data format (Jeff has
suggested we just call it the 'yt data format,' which I am also down
for.) The meeting will be on Wednesday at 1:15PM Eastern. I'll
announce it again on Wednesday (with URL), but only in IRC, not the
mailing list.

We'll be discussing what improvements could be made to the existing yt
data format:

http://yt-project.org/gdf.txt

as well as Sam's (awesome) progress with importers/exporters, and
integration with the IRATE-format. I think we're all hoping this
could be a serialization format to take to the bank, so if you have
thoughts on interop or ground-up design of a data format, we'd
appreciate your participation.

-Matt
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