IVOA Query Language
If you are interested in participating in the definition of a VO Query Language please contact Prof. Masatoshi Ohishi
masatoshi.ohishi@nao.ac.jp.
We have a 3 layer model for VOQL as represented below.
Based on the Pune (2004) agreement,In the Boston 2004 meeting, the working document toward a Proposed Recommendation was published. There have been a few minor changes since Pune. This version is to be discussed at Kyoto
The January demos ran on ADLQ0.7.4. But we should be moving to this new version now. dev.openskyquery.net is runnind ADQL0.9
The document was created based on the Boston 2004 agreement, however, several new features, such as CREATE,INSERT,UPDATE,DELETE, have not yet been included because these will actually create a huge increase in the size of the grammar.
The process of generating the
ADQL schema are described in
ADQL Schema generation steps.
An example XSL style sheet for converting
ADQL/x to
ADQL/s (strings) has been provided by NCSA
adql2sql-ns.xsl.
The currect translation services are for 0.7.4 and are at
http://openskyquery.net/adqltranslator
A
java client for the translation service has been prepared.
SkyNodes and the
SkyNode portal would form layer 2 and 1 of this system. At the Strasbourg meeting the skynode spec was split in two.
Since release of the Standard Interfaces this has also been reomved from skynode. Finally the portal section has also been reomved leaving a leaner Skynode document.
Latest
SkyNode WSDL from
http://openskyquery.net/nodes/sdss/nodeb.asmx?wsdl
Ther eare currently Java and .NET implementations of this. Nodes are registered in the
Registry and may be intereacted with through the
OpenSkyQuery Portal. You may get the .NET version off the home page of openskyquery. The Java version is included in the
SumerSchool software from the nvo.
SkyNode Registry Schema Extention
The
SkyNode also requires a registry entry you may register in the
NVO registry. The schema for the
SkyNode registry entry is here -
OpenSkyNode-v0.1.xsd
Comments should be posted on the VOQL mailing list as specified below.
VOQL Sessions in Pune 2004 October
WG Roadmap
- May 2004 version 0.7.4
- May 24-28, 2004 Interop meeting
- Work to include Units, XMATCH – Ad Hoc Group (Wil O'Mullane, Clive Page, Martin Hill, Yuji Shirasaki, Sébastien Derrière and the chair). See the details above. Need to describe semantics of ADQL more clearly
- Submit ADQL-0.8 in July
- Sep 2004 Interop meeting Agreement --> ADQL 0.9 & interaction between us and Registry/DAL/DM groups. After interaction with Registry/DAL/DM groups and discussion within our group, we prepare a draft for ADQL 1.0. When it has been approved by the IVOA executive committee, it will become ADQL 1.0.
- Sep 2004 GGF12 @ Brussels : to report activities of the VO community
- Work toward January Demos
- Jan 2005 Demos by ADQL-1.0 & SkyNode-1.0
- Improvements including New data types proposed by Yuji SHirasaki
- May 2005 Interop meeting / GGF joint WS in Japan
Discussion on
ADQL-1.x,
SkyNode-1.x ?
Mailing-list
- General working-group discussion archive.
Related Links
References
- Budavári, T., et al. 2002, ADASS XII, O10-1
- Malik, T., et al. 2002, CIDR `03, p.17, "SkyQuery: A Web Service Approach to Federate Databases"
- Budavári, T., et al. 2003, ADASS XIII, P2-18