IVOA – VOQL WG session ESAC Villafranca del Castillo Madrid, Spain Friday, October 7th, 9:30 - 13:00 Yuji Shirasaki Maria Nieto-Santisteban VOQL-Madrid.

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IVOA – VOQL WG session ESAC Villafranca del Castillo Madrid, Spain Friday, October 7th, 9:30 - 13:00 Yuji Shirasaki Maria Nieto-Santisteban VOQL-Madrid October 7, 2005

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

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

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

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

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

Roadmap 05-06 (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 2006 NVO demos Spring 2006 reference implementation ? May 2006 InterOp WS in Canada Aug 2006 IAU Prague : VO Special Session Autumn 2006 InterOp WS in Russia VOQL-Madrid October 7, 2005

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