Minutes MWG 2003-09-25

[Tony Linde]

For the record (and copied to Registry list for further discussions)...

> Some questions about ADQL versus XQUERY, Astrogrid doesn't 
> want to use relational databases with human-readable queries 
> (SQL, ADQL), they want to use XML database and use XQUERY.

The preference for XQuery is that of a few people in AstroGrid; it is not a
project policy although our current registry implementation is built that
way. 

And as we're talking about the interface for a piece of software, I'm not
sure what human-readability has to do with it.

> There was agreement at the Cambridge meeting to use ADQL, but now the 
> Astrogrid people seem to be going toward XQuery.

I am absolutely certain that there was no agreement to use ADQL for registry
queries at Cambridge; that makes no sense to me but I'm happy to be educated
:)

Cheers,
Tony. 


> -----Original Message-----
> From: owner-metadata at us-vo.org 
> [mailto:owner-metadata at us-vo.org] On Behalf Of Ramon Williamson
> Sent: 02 October 2003 18:33
> To: metadata at us-vo.org
> Subject: Minutes MWG 2003-09-25
> 
> 
> NVO Metadata Working Group Meeting
> 2003-09-25  Thursday 11am ET (10am CT, 9am MT, 8am PT)
> 
> Attendance: Matthew Graham, Gretchen Greene, Bob Hanisch, 
> Jeongin Lee, 
> Jonathan McDowell, Tom McGlynn, Wil O'Mullan, Olga Pevunova, 
> Arnold Rots, Doug Tody, Roy Williams, Ramon Williamson
> 
> 
> Agenda:
> 
> 1. Roll call & News
> 
> 2. Report and discussion of IVOA Registry WG telecon
> 
> -----
> 
> 1. Roll call & News
> - Roy - Making progress on UCDs
> - Wil - Ray @ STScI/JHU worked on VOResource and relational DB's
> 
> 2. Report and discussion of IVOA Registry WG telecon
> 
> An Identifier would not be a URL, but a pointer that could be 
> resolved. In the latest ADEC proposal the identifier would be 
> of the form: Authority.Instrument/Dataset. In this scenario, 
> there would be an ADS indentifier and an IVOA identifier and 
> a lookup mechanism to go between the two.
> 
> The Authority needn't be part of the ID, since you can look 
> up the authority for the id.  This is classical discussion 
> when creating a catalog you want it to be persistent.
> 
> Need to be able to reference datasets as they are published.
> 
> 3. What's the Demo?
> 
> In simplest terms, the demo should be: Take the identifiers 
> when we agree on them with the VOResource we agree on and 
> create a harvestable interface. Bob gave the example of the 
> DIS Demo - He added a resource, then DIS polled the registry, 
> found new resource. 
> 
> The demo should show more of what is actually happening, or 
> else it will appear to be magic.  
>  
> In the next round of prototypes we should add a stamping 
> protocol where we can rubber stamp records- give data DIS 
> approval/NVO approval to filter data. This will allow for 
> only retrieving NVO-approved data.
> 
> Roy will ask the Vizier people if they could create an OIA 
> registry so DIS could harvest from it. This will add a 
> dataset to query/demo with.
> 
> Some questions about ADQL versus XQUERY, Astrogrid doesn't 
> want to use relational databases with human-readable queries 
> (SQL, ADQL), they want to use XML database and use XQUERY.
> 
> There was agreement at the Cambridge meeting to use ADQL, but now the 
> Astrogrid people seem to be going toward XQuery.
> 
> One big problem with XQuery is that it does not do regions, 
> even as SQL doesn't. So we are actually ahead of the game 
> with ADQL with its SQL extensions to handle regions.
> 
> -- 
> 
> --- 
> ##############################################################
> ################
> Ramon L. Williamson II                  INTERNET: ramonw at ncsa.uiuc.edu
> Research Programmer				Voice: (217) 244-4208
> Radio Astronomy Imaging Team
> National Center for Supercomputing Applications (NCSA)
> 
>  I tried to learn the piano, but I was getting errors with 
> #include<mozart.h>.
> 
> **************************************************************
> ***************
> 
> 
>