SSA 1.1

[Douglas Tody]

The theoretical spectra example was always pretty rough - it would be
great if it were updated.  Perhaps (for the TCG) this would qualify as
an errata?  - Doug


On Tue, 18 Nov 2014, Carlos Rodrigo wrote:

> Hi
>
> Given that the example for theoretical spectra in the document is based in one of our services, I
> think that I should say something here... :)
>
> Doug's answer has clarified most of the things that I intended to write
>
> In fact, there are several metadata that are mandatory and are not in the example:
>
> Char.SpatialAxis.Coverage.Location.Value
> Char.SpatialAxis.Coverage.Bounds.Extent
> Char.TimeAxis.Coverage.Location.Value
> Char.SpectralAxis.Coverage.Location.Value
> Char.SpectralAxis.Coverage.Bounds.Extent
>
> The first three ones does not (usually) make sense for theoretical spectra so I think that we can
> apply what Doug says.
>
> The last two ones make sense for theoretical spectra and they are not in the example, so I think
> that it would be good to add them. In fact, at first sight, I guess that the example was writen so
> much time ago and it does not reflect some changes in the document, so it would be nice to rewrite
> it a little. In fact, there are more things that should be changed in the example. For instance,
> url's are outdated and they don't work (the domain laeff.inta.es does not exist anymore)
>
> So, if it is ok, I could write an updated version of the example
>
> Carlos
>
>
> On 11/18/2014 02:33 PM, Douglas Tody wrote:
>> Hi Pierre -
>>
>> Section 4.1 of the spec addresses the issue of theory data and notes
>> that some metadata may not have meaning for certain types of data
>> collections such as theory data.  However the section talks about query
>> constraints (input parameter semantics) and I agree is not explicit
>> about what to do with the query response.  The implication though, and
>> what was intended, is that if metadata such as spatial position is not
>> meaningful for the data collection, these values should be omitted in
>> the query response.  Hence your option #2 below applies; metadata is not
>> mandatory (i.e. may be set to null) if not defined for a specific data
>> collection such as as theory data.
>>
>>     - Doug
>>
>>
>> On Tue, 18 Nov 2014, Pierre Le Sidaner wrote:
>>
>>> Dear IVOA members
>>>
>>> I am facing a little problem with my SSA validator
>>> following the documentation metadata such as Char.SpatialAxis.Coverage.Location.Value are
>>> mandatory in the query response
>>> but example in the text for response of Theory-SSA omit some of them.
>>>
>>> My question is :
>>> Am I badly reading the documentation ?
>>> should we modify the mandatory fields for non "observational" SSA
>>> Should we modify the example of Theorical SSA
>>>
>>> regards
>>> Pierre
>>>
>>> --
>>> -------------------------------------------------------------------------
>>>                           Pierre Le Sidaner
>>>                        Observatoire de Paris
>>>
>>> Division Informatique de l'Observatoire
>>> Observatoire Virtuel 01 40 51 20 89
>>> 61, avenue de l'Observatoire 75014 Paris
>>>
>>> mailto:pierre.lesidaner at obspm.fr
>>> http://vo.obspm.fr
>>>
>>> --------------------------------------------------------------------------
>>>
>