IVOA WG data access layer

[Markus Dolensky]

 > [...] Data modelers (DM) provide the
 > necessary definitions and data structures. The registry is our
 > directory. Meta data are dealt with in the UCD group. VOQL provides a
 > query mechanism and the data format is VOTable.

Hence, DAL will have interaction with ALL the other WGs. We should be 
prepared to give all of them input (requirements) and we should also be 
prepared to accept certain constraints to stay within the framework they 
(the other 5 WGs) are setting within their scope.

We need a plenary session in Cambridge ...

... in order to review the scope of all the WGs and to see whether 
things need some re-arrangement or not. That's why the chair of the POC 
is on the CC list.

Doug, Tony:
In that context it might be worthwhile trying to map the existing system 
architectures of NVO and Astrogrid*  with the  WG breakdown. If on top 
of that we also have the names of those who work on the individual parts 
of a project on one side as well as the applicable standards (WGs) on 
the other side we would then know who should keep in touch with whom.

Markus

*) Astrogrid is defining the AVO grid architecture





Tony Linde wrote:
> I guess this group should begin to state the requirements for a query
> language based on its work but I agree that there is quite a lot of overlap.
> The Registry group encompasses the registry query language/format.
> 
> Cheers,
> Tony. 
> 
> 
>>-----Original Message-----
>>From: Clive Page [mailto:cgp at star.le.ac.uk] 
>>Sent: 04 April 2003 12:28
>>To: Markus Dolensky
>>Cc: dal at ivoa.net; Keith Noddle
>>Subject: Re: IVOA WG data access layer
>>
>>
>>On Fri, 4 Apr 2003, Markus Dolensky wrote:
>>
>>
>>>The actual query could be based on a TBD VOQL for which there is 
>>>another WG.
>>
>>Yes, but the VOQL working group appears not yet to have got 
>>off the ground, and the mailing list (to which I subscribe) 
>>has had very little traffic.  Since these topics are quite 
>>closely related, it is hard to know whether to deal with them 
>>separately or together.
>>
>>-- 
>>Clive Page,
>>Dept of Physics & Astronomy,
>>University of Leicester,    Tel +44 116 252 3551
>>Leicester, LE1 7RH,  U.K.   Fax +44 116 252 3311