1. IVOA – VOQL WG session ESAC Villafranca del Castillo Madrid, Spain Friday, October 7th, 9: :00 Yuji Shirasaki Maria Nieto-Santisteban
VOQL-Madrid
October 7, 2005

2. Discussed Reviewed ADQL and SkyNode specifications WDs
ADQL = CORE + EXTENSIONs
Core provides easy integration of DAL & VOQL
Basic SkyNodes support CORE ADQL + optional extensions
Full SkyNodes support CORE ADQL + XMATCH extensions + optional extensions
Different XMATCH functions with different parameter sets
VOQL-Madrid
October 7, 2005

3. Discussed Mayor points of debate Extensions: top, offset
Data types follow VOTable
timestamp, time, date, timeinterval
conclusion: only keep VOTable data types for returned data tables
Specifying table names qualified by archive names, what can we use for a short name?
can we use the SHORTNAME that the registry has? Can we demand uniqueness? (no)
conclusion: we use the identifier in the ADQL
Need to define how to express units. What is the syntax?
VOQL-Madrid
October 7, 2005

4. Presented Brian Thomas - Achieving a Unified Query Layer in the VO
Good discussion about how to integrate Data Models UCDs & VOQL -- All agreeded we need to work together
André Schaaff - Vizier Access to Catalogs
As part of the VOTech project plans to include implementing Vizier catalogs as SkyNodes with ADQL access
** implications for the registry
VOQL-Madrid
October 7, 2005

5. Requested/Encouraged
Metadata
Please better metadata, otherwise little use
VOQL needs diversity
Portal supporting distributed queries!
VOQL-Madrid
October 7, 2005

6. Agreed First, Get WD -> PR -> Rec Finish WDs:
Nov 15
Open for comments within WG: 2 weeks (end of Nov)
Promote to PR (needs at least a month)
Promote to Rec (needs approval from Exec)
Implement changes & Upgrade by
March 1st 
VOQL-Madrid
October 7, 2005

7. Roadmap (Oct – 7th 05)
JVO will release a new SkyNode toolkit in October
on the tap for future
The '!' operator problem. Need for proper footprints
More flexibility for XMATCH
How do we include errors?
new algorithms
SkyNode -> High level data access service?
ADQL/x <–> ADQL/s what do we really need?
Include VOStore – Async mech.
Inclusion of simulated data access (with theory IG)
Jan NVO demos
Spring reference implementation ?
May InterOp WS in Canada
Aug IAU Prague : VO Special Session
Autumn 2006 InterOp WS in Russia
VOQL-Madrid
October 7, 2005