[obstap: obs_title]free format data model field

[Douglas Tody]

It is used to help interpret the *response* from the discovery query,
so it does have a role in discovery although it would not normally
be used to pose the query itself.  This serves a different role than
the more quantitative metadata but is useful for a human to understand
the data.

For a non-astronomy example of this just look at any Google query
(this is also discovery).  For example search for "fits keyword
title".  The first line of each hit is the title, which in this case
is evidently auto-generated by the search engine from the page title
or whatever.

 	- Doug

(I'm not sure how productive it is to continue this discussion since
this is already included in our data models, but I guess it is always
interesting to understand where these things come from.)




On Wed, 16 Mar 2011, Juande Santander Vela wrote:

> But what is the role of this field in the discovery? Only for human readability in case of returning less than around 100 records, it seems...
>
> Am 16/03/2011 um 14:40 schrieb Mireille Louys:
>
>> Hi Doug, all ,
>>
>> I think we agreed to have this field in the Obscore data model and re-use the definition from the Spectrum DM.
>> It is an ObsTAP optional field in free text format.
>> As you precisely explain this is fully relevant for the user to interpret the response of a query and for applications to re-use this metadata when dealing with observations.
>>
>> I inserted a sentence for this in the new version of the draft.
>> Mireille
>>
>>
>> On 16/03/2011 13:33, Douglas Tody wrote:
>>> On Wed, 16 Mar 2011, Francois Bonnarel wrote:
>>>
>>>> On the obs_title discussion:
>>>> -----------------------------------------------
>>>>
>>>> /As far as I understand obs_title is a free text description. Maybe usefull but the field name is confusing I think. Nothing to do with an ID./
>>>
>>> Note that this is already in the data model (SSA/Spectrum) with the
>>> name "title": DataID.Title.  It is also in SIA1 (VOX:Image_Title).
>>> In both cases it is mandatory metadata.  The name derives from FITS
>>> where it is commonly used for image data.  It is not an identifier
>>> in the usual sense, but is part of dataset identification, providing
>>> a human readable, free text (but short) description of the dataset.
>>> This is commonly used in analyis software to e.g. describe a dataset in
>>> a query response table, in a plot header, in the label of a displayed
>>> image, and so forth.
>>>
>>>    - Doug
>>>
>>
>> --
>> --------------------------------------------------------------
>> Mireille LOUYS          mailto: mireille.louys at unistra.fr
>>
>> L S I I T&      CDS,
>> Ecole Nationale Superieure            Observatoire de Strasbourg
>> de Physique de Strasbourg,            11, Rue de l'Universite
>> Boulevard Sébastien Brant, BP 10413   67000 STRASBOURG
>> 67412 ILLKIRCH Cedex       	      Tel: +33 3 68 85 24 34
>> ---------------------------------------------------------------
>>
>>
>>
>
> --
> Juande Santander Vela
> Software Engineer, ALMA Archive Subsystem
> Data Flow Infrastructure Department, Software Development Division
> European Southern Observatory (Germany)
>
> Albert Einstein: Sólo hay dos cosas infinitas, el universo y la estupidez humana, y de la primera no estoy seguro.
>
>