InterOpJune2025DAL < IVOA

---+ DAL Sessions Schedule - IVOA June 2025 Interoperability Meeting

* [[InterOpJune2025][back to main programme page]] *

| *Schedule Summary* |||||||
|  *Session*  |  *Date Time UTC*  | *UTC-04:00* | *UTC+01:00* | *UTC+02:00* | *UTC+08:00* | *UTC+10:00* |
| ^ | ^ |  __Washington DC__  |  _London_  |  _Paris_  |  _Perth/Beijing_  |  _Canberra (AEST)_  |
| DAL 1 |  [[https://www.timeanddate.com/worldclock/fixedtime.html?msg=DAL+1+%28Interop+June+2025+-+College+Park%29&iso=20250605T09&p1=263&ah=1&am=30][5 June 13:00]]  |  5 June 09:00  |  5 June 14:00  |  5 June 15:00  |  5 June 21:00  |  5 June 23:00  |
| DAL 2 |  [[https://www.timeanddate.com/worldclock/fixedtime.html?msg=DAL+2+%28Interop+June+2025+-+College+Park%29&iso=20250606T09&p1=263&ah=1&am=30][6 June 13:00]]  |  6 June 09:00  |  6 June 14:00  |  6 June 15:00  |  6 June 21:00  |  6 June 23:00  |

---++ DAL 1

<b><u>Time:</u> Thursday June 5 - 09:00-10:30 _(College Park local time)_ </b> [[https://www.timeanddate.com/worldclock/fixedtime.html?msg=DAL1&iso=20231110T14&p1=393&ah=1&am=30][<br />]]

<b><u>Location:</u> Room 2309</b>

<b><u>Notes:</u></b> [[%ATTACHURL%/DAL1.txt][notes (txt)]]<i><br /></i>

<u> *Moderator:* [[IVOA.JoshuaFraustro][Joshua]]</u>, <u> *Notetaker:* [[IVOA.GregoryMantelet][Grégory]]</u>

|  *Speaker*  |  *Title*  |  *Abstract*  |  *Time*  |  *Material*  |
|  Massimo Costantini<br />(in person)  | Spoke3 Archive Infrastructure | In this presentation, I will introduce a project currently under development and<br />funded by the European Union. The infrastructure is designed to provide access<br />to a curated set of Gaia data through a dedicated web portal, as well as via<br />TOPCAT and Python clients. We are implementing custom TAP and !DataLink services<br />to support flexible and efficient data access tailored to scientific use cases. |  15'+3'  |  [[%ATTACHURL%/Spoke_3_Archive_Infrastructure_-_ESJ.pdf][pdf]]  |
|  Pat Dowler<br />(remote)  | DALI update | This will be a short update on the current status of WD-DALI-1.2. The authors feel<br />the document is now ready to move forwards to RFC so we will also summarise all<br />the changes from the DALI-1.1 recommendation. |  15'+3'  |  [[%ATTACHURL%/WD-DALI-1.2.pdf][pdf]]  |
|  Grégory Mantelet<br />(remote)  | ADQL PEG grammar and validation | One of the major changes in the next version of ADQL is the migration from a BNF<br />to a PEG grammar, which will provide a clearer definition of the language.<br />Unlike the ADQL BNF grammar, the PEG grammar must be machine-readable. This is<br />particularly important for language validation. In this talk, I will discuss the<br />challenges and progress of this transition to PEG. In parallel, I am working on<br />a validator. I will explain how it works and what its current status is. |  15'+3'  |  [[%ATTACHURL%/adql-peg-grammar-validation.pdf][pdf]]  |
|  _All_  | ADQL-next discussions | A privileged time for discussions about the desired changes to the ADQL language.<br /><span data-mce-mark="1" style="background-color: transparent;">After a reminder of the features already mentioned during the last<br /></span>interoperability meetings, the discussions will begin in order to decide which<br />features should be included in the next ADQL version. Everyone is also invited<br />to contribute ideas and use cases for any desired language features. | |  [[%ATTACHURL%/adql-next-features.pdf][pdf]]  |

---++ DAL 2

<b><u>Time:</u> Friday June 6 - 9:00-10:30 _(College Park local time)_ </b> [[https://www.timeanddate.com/worldclock/fixedtime.html?msg=DAL1&iso=20231110T14&p1=393&ah=1&am=30][<br />]]

<b><u>Location:</u> Room 2309</b>

<b><u>Notes:</u></b> <i> [[%ATTACHURL%/DAL2.txt][notes (txt)]]<br /></i>

<u> *Moderator:* [[IVOA.JoshuaFraustro][Joshua]]</u>, <u> *Notetaker:* [[IVOA.GregoryMantelet][Grégory]]</u>

|  *Speaker*  |  *Title*  |  *Abstract*  |  *Time*  |  *Material*  |
|  Stéphane Erard<br />(remote)  | Accessing Solar System observations from ESO archive | Solar System observations at ESO would benefit from an access via EPN-TAP,<br />similar to that provided on the HST archive. This is a report on a first test to<br />identify these data in the archive, and difficulties encountered during the<br />process. |  15'+5'  | [[%ATTACHURL%/Erard_ESO.pdf][pdf]] |
|  Jose Osinde Lopez<br />(remote)  | Evolution of TAP toward a more _stateless_ architecture | TAP is a core component of the ESDC Archives, and to meet growing demands,we aim<br />to evolve it into a more scalable, fault-tolerant, and flexible service. While a<br />fully stateless architecture offers clear benefits, such as easier scaling and<br />improved resilience, some session state must still be maintained.<br />This presentation will focus on the architectural changes required to move<br />towards a stateless TAP implementation while preserving essential stateful<br />functionality. |  15'+5'  | [[%ATTACHURL%/ESAC_TAP_IVOA_Jun2025-3.pdf][pdf]] |
|  Markus Demleitner<br />(in person)  | A management interface for persistent TAP uploads | At the Malta interop, I have proposed a TAP extension to support<br />persistent uploads. What was still missing was a management interface<br />that allows users to extend the lifetime of their uploads and create<br />indexes. In this talk, I will fill that gap. | 15'+5' | [[%ATTACHURL%/persistent-notes.pdf][notes]] [[%ATTACHURL%/persistent-slides.pdf][slides]] |
|  Pat Dowler<br />(remote)  | TAP-1.2 - !OpenAPI and user-tables | This will be an update of the effort to make the user-managed tables feature an<br />optional part of the TAP standard using !OpenAPI as the core specification. This work<br />touches WD-VOSI-1.2, WD-DALI-1.2, and the beginning of work on WD-TAP-1.2. |  15'+5'  |  [[%ATTACHURL%/WD-TAP-1.2.pdf][pdf]]  |
<br />* [[InterOpJune2025][back to main programme page]] *

Attachments

Topic attachments
I	Attachment	History	Action	Size	Date	Who	Comment
txt	DAL1.txt	r1	manage	13.9 K	2025-07-15 - 14:05	GregoryMantelet	DAL 1 session notes
txt	DAL2.txt	r1	manage	10.0 K	2025-07-15 - 14:06	GregoryMantelet	DAL 2 session notes
pdf	ESAC_TAP_IVOA_Jun2025-3.pdf	r2 r1	manage	1012.3 K	2025-06-06 - 09:11	JoseOsinde	Describe the changes required to transition to a stateless implementation of the ESA TAP services.
pdf	Erard_ESO.pdf	r1	manage	186.7 K	2025-06-06 - 12:03	StephaneErard
pdf	Spoke_3_Archive_Infrastructure_-_ESJ.pdf	r1	manage	3644.6 K	2025-06-04 - 19:11	MarcoMolinaro
pdf	WD-DALI-1.2.pdf	r1	manage	194.7 K	2025-06-05 - 12:57	PatrickDowler
pdf	WD-TAP-1.2.pdf	r1	manage	84.2 K	2025-06-06 - 12:55	PatrickDowler
pdf	adql-next-features.pdf	r1	manage	1791.6 K	2025-05-30 - 07:58	GregoryMantelet	Discussion topics for the next version of ADQL (last talk in DAL 1)
pdf	adql-peg-grammar-validation.pdf	r1	manage	5003.7 K	2025-06-05 - 12:01	GregoryMantelet
pdf	persistent-notes.pdf	r1	manage	88.7 K	2025-06-05 - 21:28	MarkusDemleitner
pdf	persistent-slides.pdf	r1	manage	118.5 K	2025-06-05 - 21:28	MarkusDemleitner

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Topic revision: r20 - 2025-07-15 - GregoryMantelet