TAP, ADQL and PgSphere

[Gretchen Greene]

I've been following from a distance on the mailing list.

My question is that you are discussing design of a reference 
implementation with a single specific open source solution.  
While this is widely adopted and 'a' viable one,  I'm not sure 
that it is advantageous to moving forward a universal standard 
when we currently do not have clear region handling.

While TAP is NOT standard,  we keep moving forward into all 
possible areas of implementation,  without clearly settling 
out interfaces.

I would like to clearly see a presentation how the DAL 
protocols will address the region capabilities in a standard 
and CONSISTENT mechanism, e.g. how VOSI/Registry interfaces 
factor into the integration of TAP queries, SIA v2, ...  with 
service capability.

I advocate prototyping,  i'm concerned to see small groups 
adopting specific software solutions to drive convenient 
standards evolution.  I've caught wind of peripheral 
discussions for observation data model TAP work,  but it seems 
to be going on in behind the scenes efforts and not clear to 
me how TAP, Datamodels, Registry, and VOSI are working 
together.

-Gretchen