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The task of the DAL working group is to define and formulate VO standards for remote data access. Client data analysis software will use these services to access data via the VO framework; data providers will implement these services to publish data to the VO. The DAL working group will define the scope of the DAL standards, outline a process by which DAL standards are defined, and generate the initial version 1.0 of the DAL standard. This standard will provide guidance to data centers and survey projects when designing VO compliant interfaces. It will allow them to justify the allocation of resources for its implementation and maintenance. Once the work on Version 1.0 is accomplished the working group will coordinate future development of the standard.
Standard | Current | Released | Errata | Next | Doc Source |
---|---|---|---|---|---|
ADQL - Astronomical Data Query Language | v2.1 REC | 2023-12-15 | - | GitHub | |
DALI - Data Access Layer Interface | v1.1 REC | 2017-05-17 | Errata | 1.1 Next | GitHub |
Datalink | v1.1 REC | 2023-12-15 | - | 1.1 Next | GitHub |
ObsLocTAP - Observation Locator Table Access Protocol * | v1.0 | 2021-07-24 | - | GitHub | |
SimDAL - Simulation Data Access Layer ** | v1.0 REC | 2017-03-20 | - | Volute SVN | |
ConeSearch - Simple Cone Search | v1.03 REC | 2008-02-22 | Errata | 1.03 Next | GitHub |
SIA - Simple image Access | v2.0 REC | 2015-12-23 | Errata | 2.0 Next : DAP | GitHub |
SLAP - Simple Line Access | v1.0 REC | 2010-12-09 | Errata | ?? | |
SODA - Server-side Operations for Data Access | v1.0 REC | 2017-05-17 | Errata | 1.0 Next | GitHub |
SSA - Simple Spectral Access | v1.1 REC | 2012-02-10 | Errata | ?? GitHub for issues | |
TAP - Table Access Protocol | v1.1 REC | 2019-09-27 | Errata | 1.1 Next | GitHub |
TAPRegExt - A VOResource Schema Extension for Describing TAP Services ** | v1.0 REC | 2012-08-27 | Errata | GitHub | |
VOEvent Transport Protocol * | v2.0 REC | 2017-03-20 | - | GitHub |
** Registry standard developed by the DAL working group.
* Interest group developed standard endorsed and administered by the DAL working group.
Standard | Version | Date | Status | Doc Source | Expected Release |
---|---|---|---|---|---|
ConeSearch - Simple Cone Search | v1.1 | 2020-08-28 | Working Draft | GitHub | |
DALI - Data Access Layer Interface | DALI-1_1-Next | Revision to 1.2 | GitHub | Q4 2021 | |
EPN-TAP: Publishing Solar System Data to the Virtual Observatory * | v2.0 | 2020-10-27 | PR & RFC | GitHub | |
ObjVisSAP - Object Visibility Simple Access Protocol | v1.0 | 2020-05-14 | Working Draft | GitHub | Q2 2021 |
ProvSAP | |||||
ProvTAP - Provenance Table Access Protocol * | v0.1 | 2019-03-22 | (internal) WD | ||
SLAP - Simple Line Access Protocol | v2.0 | 2019-04-09 | Working Draft | Volute SVN | pending SSLDM-2.0 |
Upcoming events and meetings:
IVOA Events wiki page.
Previous DAL Roadmaps can be found starting from the IVOA TCG wiki page in the IVOA Technical Assessment and Roadmap Documents section.
Older roadmaps can be found here:
This page contains some ideas and definitions to help frame the definition of DAL standards. To be discussed.
This page contains some hints to help defining new service paremeters according to the 3 factor semantics.
I | Attachment | History | Action | Size | Date | Who | Comment |
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DAL-Cambridge-Report.pdf | r1 | manage | 145.8 K | 2003-10-23 - 21:01 | DougTody | Cambridge DAL WG Plenary Report |
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DAL-Strasbourg-Report.ppt | r1 | manage | 987.5 K | 2003-10-23 - 20:35 | DougTody | Strasbourg DAL WG Plenary Report |
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IVOA-DAL-Jul03.doc | r1 | manage | 38.0 K | 2003-07-23 - 06:10 | MarkusDolensky | DAL Progress Report July 03 by D. Tody |
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IVOA-DAL-Jul03.pdf | r1 | manage | 19.3 K | 2003-07-23 - 06:09 | MarkusDolensky | DAL Progress Report July 03 by D. Tody |
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TAP-Analysis.pdf | r1 | manage | 419.7 K | 2007-09-26 - 16:06 | KeithNoddle | |
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TAP-draft.pdf | r1 | manage | 79.8 K | 2007-09-26 - 16:06 | KeithNoddle | |
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dalsedspec.pdf | r1 | manage | 1218.9 K | 2003-10-18 - 16:16 | MarkusDolensky | SEDs & AVO prototype and ... (.pdf) |
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dalsedspec.ppt | r1 | manage | 284.5 K | 2003-10-18 - 15:38 | MarkusDolensky | SEDs & AVO prototype and evolution to SSA |
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ranking-v01.pdf | r2 r1 | manage | 100.9 K | 2006-05-12 - 14:35 | MarkusDolensky | Ranking Query Result Sets |
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sIAevol1.ppt | r1 | manage | 37.5 K | 2003-10-23 - 20:48 | DougTody | URL templating etc. proposals by F. Bonnarel |
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spie04-5493-47.pdf | r1 | manage | 527.6 K | 2004-07-01 - 15:16 | MarkusDolensky | SSA poster, status June 2004, 3x3 ft. |
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ssa-v01-MD.doc | r1 | manage | 4752.0 K | 2004-09-25 - 14:12 | MarkusDolensky | SSA Spec. V0.1 |
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ssample1.xml | r3 r2 r1 | manage | 31.3 K | 2004-09-25 - 13:31 | MarkusDolensky | SSA sample SED serialization in VOTable format |
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ssample20041021.xml | r1 | manage | 31.8 K | 2004-10-21 - 13:46 | MarkusDolensky | VOTable serialization; SSA data format |
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