Cube/ImageDM - Comments on Observation-Dataset Overview diagram

[Arnold Rots]

On Mon, May 12, 2014 at 10:36 PM, CresitelloDittmar, Mark <
mdittmar at cfa.harvard.edu> wrote:

> Mireille,
>
> Thanks for the great input...
>
> On Mon, May 12, 2014 at 12:28 PM, Louys Mireille <
> mireille.louys at unistra.fr> wrote:
>
>>  Hi Mark , hi DMers,
>>
>> Thanks for the update.
>> Here are my comments about the new diagram binding Dataset and Experiment:
>>
>> - is there any reason why *ObsDataset *is 'slanted' , i.e is considered
>> as an abstract class?
>>
>
> Because I don't think ObsDataset is something anyone would instantiate..
> It must be some "kind" of dataset to be useful,  an ImageDataset,
> SpectralDataset, or even for
> the DAL services, the particular QueryResponse.
>

I'm not so sure. An ObsDataset could be a collection of ImageDataset,
SpectralDataset, etc.
Close to home: the Chandra data distribution tar files are really
ObsDatatsets and contain
images, spectra, sparse cubes, etc.

  - Arnold


>
> ...
> Mark
>
>
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