Cube Data Access Layer implementation note

[Laurent Michel]

Hi Markus

Let's "try again with an explanation":

Imagine the following fields in your DAL response (SIAV2 e.g.)

  access_type=application/xml+votable;content=soda
  access_url=http://my.soda?ID=xyz

These 2 values are enough to run SODA with the common parameters (POS,TIME..).
The relevant parameter ranges can likely be found within the current VOTable. No need to any explicit reference to any DM for this.
If you want to refine the SODA description, just run http://my.soda?ID=xyz and get a classical service descriptor.

As you can see, I do not propose any new format at all.
I just want to provide SODA with the capability of running with the simplest way.

To me, the gain is 2 folds: 1) No need operate a Datalink service to run a SODA service 2) Applying this scheme to DataLink 
response could (or not - up to you) save the duplication of the SODA service descriptor for each link.
The (low) cost: pushing the parameter description from the Datalink service to this new and simple SODA capability .

Cheers
Laurent


Le 02/03/2016 09:06, Markus Demleitner a écrit :
> Hi Laurent,
>
> On Tue, Mar 01, 2016 at 06:10:07PM +0100, Laurent Michel wrote:
>> I believe there is no requirement for this.
>> So it seems to me legal for DAL responses to have
>>
>>     access_type=application/xml+votable;content=soda (Mime type to be validated)
>>
>> Providing that way a direct access to a SODA service described
>> ahead in the response.
>
> What would be the content of this document?
>
> Are you really proposing defining yet another format that our
> services would have to produce and that our clients would have to
> parse?  To define another service interface?  When Datalink does all
> we need?
>
> I may be dumb, but I simply cannot understand what problem you see
> with simply using datalink as the "SODA self-description".  Perhaps
> you can try again with an explanation?
>
>         -- Markus
>

-- 
jesuischarlie

Laurent Michel
SSC XMM-Newton
Tél : +33 (0)3 68 85 24 37
Fax : +33 (0)3 )3 68 85 24 32
laurent.michel at astro.unistra.fr <mailto:laurent.michel at astro.unistra.fr>
Université de Strasbourg <http://www.unistra.fr>
Observatoire Astronomique
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F - 67200 Strasbourg
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