IVOA Interoperability Meeting

6-7 Oct 2005: ESAC, Madrid, Spain

VOQL Session


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')
- break -

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

  1. Short presentations (No more than 40 - 45'; 10' to 15' each depending on quantity )
  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

title version doc
ADQL WD V1.02 ADQL-20050924.pdf
SkyNode WD V1.02 SkyNodeInterface-20050929.pdf
ADQL schema    
SkyNode WSDL    


Presenter Subject Slides
MariaNieto or YujiSHIRASAKI Agenda, Road Map, SkyNode spec review VOQL-05-10-07.ppt
YujiSHIRASAKI Review ADQL specifications WD ADQL-WD-Update.pdf
BrianThomas Achieving a Unified Query Layer in the VO  
AndreSchaaff "VizieR" in the context of ADQL-SkyNode pdf presentation


File By
VOQL Session Notes (Part I): voql-notes.txt RoyWilliams
VOQL Session Notes (Part II): VOQL2Madrid.pdf BobHanisch

Tools for SkyNode

Title Who Description Link


Topic attachments
I Attachment History Action Size Date Who Comment
PDFpdf ADQL-20050924.pdf r1 manage 425.6 K 2005-09-30 - 01:48 MariaNieto ADQL WD
PDFpdf ADQL-WD-Update.pdf r1 manage 137.0 K 2005-10-19 - 00:56 YujiSHIRASAKI ADQL WD update
PDFpdf SkyNodeInterface-20050929.pdf r1 manage 392.9 K 2005-09-30 - 01:50 MariaNieto SkyNode Interface
PowerPointppt VOQL-05-10-07.ppt r1 manage 1386.5 K 2005-10-18 - 18:11 MariaNieto Agenda, Road Map, SkyNode spec
PDFpdf VOQL2Madrid.pdf r1 manage 32.1 K 2005-10-18 - 18:13 MariaNieto VOQL Session Notes (Part II)
PDFpdf VOUnifiedQueryTalk.pdf r1 manage 1274.8 K 2006-05-18 - 16:32 BrianThomas ORM solution to allow Unified Query
PDFpdf VizieR-VOQL_Escorial.pdf r1 manage 98.1 K 2005-10-07 - 10:42 AndreSchaaff "VizieR" in the context of ADQL-SkyNode
Texttxt voql-notes.txt r1 manage 1.8 K 2005-10-18 - 18:13 MariaNieto VOQL Session Notes (Part I)
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Topic revision: r12 - 2007-01-17 - BrunoRino
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