IVOA Data Access Layer

Upcoming events and meetings

• DAL running meeting: -
• IVOA Interoperability meeting: 8-12 June 2026 - Strasbourg

Rationale

The task of the Data Access Layer (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, while data providers will implement
these services to publish data to the VO.

The DAL WG 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 a new DAL standard. Standards will provide guidance to data centers and survey projects when designing
VO compliant interfaces. They will allow them to justify the allocation of resources for their implementation and maintenance.

Community

Chair: Grégory Mantelet

V-Chair: Joshua Fraustro

Mailing list: dal@ivoa

• Subscribe and share your ideas
• Online mail archive

• Subscribe and let's speak together more interactively

• All IVOA standards are on the ivoa-std GitHub repository
• PullRequests and Issues are a very nice place to contribute on concrete topics

• Register with the IVOA Twiki and edit this or add new pages

Standards

Current Standards (REC)

Ongoing Work (WD and PR)

Notes

Events timeline & Roadmap

Older roadmaps:

• DAL Roadmap (May 2007)
• status May 2006 (.pdf)
• status May 2005 (.pdf)
• status June 2004 (.pdf)
• overview May 2004 (.pdf)

Miscellaneous

Ideas

• (deprecated) Feedback, prototypes, ideas and proposals
• (deprecated) Notes on Defining a DAL Standard
• (deprecated) Notes on Defining new service parameters

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