Call for contributions to DAL WG session at June 2026 Interop

[Theresa Dower]

Paul,

Whether or not it's a session talk, I'd love to help MAST coordinate with you and Grégory on this.

We (MAST, but also myself and Joshua directly) are indeed working from a fork of VOLLT, using only the ADQL library portion. The library runs only ADQL-to-database-specific query translation in a Java microservice in our otherwise Python-based TAP stack. No matter where the canonical upstream code lives, we'll probably have to keep working from a fork in the medium term (until we finish migrating away from MAST-specific spatial infrastructure in classes we include) but having a common base to work from separate from the other included libraries would be an improvement. I do like the idea of a codebase used across so many archives and integrated into reference implementations of IVOA standards having a home there if the primary author and github org maintainers support it.

Cheers,
--Tessa

________________________________
From: interop on behalf of Paul Harrison via interop
Sent: Thursday, April 2, 2026 3:34 AM
To: MANTELET Grégory (OBAS); Joshua Fraustro
Cc: DAL WG; interop at ivoa.net
Subject: Re: Call for contributions to DAL WG session at June 2026 Interop

Hi,

I am not sure if this is absolutely worth a talk, but it concerns you both - my group and I believe MAST have been working off a fork of the VOLLT library with the principal aim of using the most recent ADQLLib - which has been living off on a branch in the main repository - I have created https://github.com/Javastro/ADQLLib which has merged the branch and done a few minor cleanups, and most importantly deleted the UWS and TAP code to allow ADQLLib to evolve at its own pace - I would like to propose moving this to the https://github.com/ivoa organisation to allow greater collaboration and participation. There are some open questions such as

* publishing to a maven repository
* moving any existing documentation to be within the same repository.

Regards,
Paul.

On 1 Apr 2026, at 13:57, Gregory MANTELET via interop <interop at ivoa.net> wrote:


Dear DAL and IVOA members,

The June IVOA Interoperability Meeting [indico.ict.inaf.it]<https://urldefense.com/v3/__https://indico.ict.inaf.it/event/3454/overview__;!!PDiH4ENfjr2_Jw!CuyXtJeX_qFTXMbstyNvxhqj4KVkHm0l7pUIo_PXTeo-rWdlpvVJ2N6J_FZtQBIeSg4qK4Kmk9A2ixG7w2afq3j_$> will take place in Strasbourg (France) from the 8th to the 12th of June 2026. Remote attendance is supported.

As a reminder, if you want to participate to this meeting, do not forget to register on the meeting website [indico.ict.inaf.it]<https://urldefense.com/v3/__https://indico.ict.inaf.it/event/3454/registrations/1551/__;!!PDiH4ENfjr2_Jw!CuyXtJeX_qFTXMbstyNvxhqj4KVkHm0l7pUIo_PXTeo-rWdlpvVJ2N6J_FZtQBIeSg4qK4Kmk9A2ixG7w8dmueAo$> (even you plan to attend remotely).

With this email, Joshua and I invite you to contribute to DAL sessions with a DAL related topic.

DAL stands for Data Access Layer. This Working Group aims to define standards and protocols to access data in an interoperable way. Here are few examples of well-known DAL standards: (Simple) Cone Search, SIA (image access), SSA (spectra access), TAP (Table Access Protocol) and ADQL (SQL-like language to query a database). The full list of DAL standards is available on the IVOA Documents page [ivoa.net]<https://urldefense.com/v3/__https://www.ivoa.net/documents/__;!!PDiH4ENfjr2_Jw!CuyXtJeX_qFTXMbstyNvxhqj4KVkHm0l7pUIo_PXTeo-rWdlpvVJ2N6J_FZtQBIeSg4qK4Kmk9A2ixG7wwlkDDit$>.

During this interop., you can contribute, remotely or in-person, with a talk presenting implementations, sharing your experience as user, presenting and discussing progress on a DAL standards, or presenting use-cases.

If you are interested, please send your contribution to gregory.mantelet at astro.unistra.fr<mailto:gregory.mantelet at astro.unistra.fr> and jfraustro at stsci.edu<mailto:jfraustro at stsci.edu> with:

  *   a speaker name,
  *   a title,
  *   ideally an abstract.

If you are unsure about the suitability of a talk, or are a first time contributor, please get in contact with us.

Cheers,
Grégory Mantelet and Joshua Fraustro


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