IVOA Interoperability Meeting

6-7 Oct 2005: ESAC, Madrid, Spain

VOQL Session

Timetable

Session 1 (Oct 10, 9:30-11:00)

1. Road Map: (YujiSHIRASAKI & MariaNieto: 10')
   • Where are we?
   • Meeting goals
2. Review ADQL and SkyNode specifications WD: (All: 60')
   • ADQL v1.0
     • SQL 92
       • The SELECT statement
       • BNF independent from language (Post C# as an external reference)
     • XMATCH function(s) syntax
     • Single & Multi node queries
   • SkyNode v1.0
     • XMATCH function(s) algorithms
     • Architecture Decoupling (Cascade and Parallel)
     • Add a mechanism to transmit "messages" in addition to data
     • Content standardization in returned VOTable
3. Metadata. How enforce quality? (MariaNieto: 10')
4. Discuss schedule to upgrade skynodes from 0.7 to 1.0 (All: 10')

Session 2 (Oct 10, 11:30-13:00)

1. Short presentations (No more than 40 - 45'; 10' to 15' each depending on quantity )
   • BrianThomas - A VO Catalog model proposal (10')
   • AndreSchaaff - VizieR in the context of ADQL-SkyNode (10')
2. Future - Brief discussion (As time permits)
   • The '!' operator problem. Need for proper footprints. (MariaNieto: 10')
   • VOQL needs diversity: equivalent implementations of Open SkyQuery portals accepting distributed queries
   • XMATCH function(s) algorithms (How do we include errors?)
   • How do we deal with big query results? The path to VOStore
   • Xmatch works only between primary table from SkyNode (What needs to be done to allow xmatch with others?)
   • Table data model (standard column names) Where does Catalog Data Model WG stand?
   • Query by ucd and utype
3. Update Road Map

Documents & schema

Presentations

Tools for SkyNode

Links

• InterOpOct2005
• InterOpMay2005VOQL
• InterOpSep2004VOQL
• InterOpMay2004VOQL
• InterOpOct2003VOQL
• InterOpMay2003VOQL

• VOQL-05-10-07.ppt: Agenda, Road Map, SkyNode spec

• VOQL2Madrid.pdf: VOQL Session Notes (Part II)