[NOTES] DAL Running Meeting #20 - Spectral lines

[Grégory Mantelet]

Dear DAL running participants and others,

Thank you very much for this successful and efficient running meeting.
It is good to finally see this spectral line case evolving. Of course, 
there are
still work to do (thank you in advance to Nicolas and Markus) but we now 
have a
clearer path to follow.

I have just finished to update our notes:

    https://yopad.eu/p/DAL_Running_Meeting_#20%20-%20Spectral%20lines


For those who participated, don't hesitate to complete (or correct) them
directly. I will keep, and then post on the wiki, a final frozen copy of 
them
next week.

Best regards,
Grégory


On 12/05/2025 11:22, Gregory MANTELET wrote:
> Hello,
>
> For all interested individuals, this is a reminder for the DAL Running 
> Meeting #20 about Spectral Lines.
> It is *today *at*2:00 PM UTC* /(see below for the Zoom link)/.
>
> Best regards,
> Grégory and Joshua
>
>
> On 06/05/2025 11:23, Gregory MANTELET wrote:
>> Dear DAL members and DM chairs,
>>
>> Thanks you for your votes.
>>
>> Here are the info for the next DAL running meeting:
>>
>>     *Date     :* *Monday 12 May 2025*
>>     *Time     :* *2:00 PM UTC*
>>     *Duration :* 1 hour
>>     *Zoom link:*
>>     https://cnrs.zoom.us/j/93123478759?pwd=CijFJxycChKygbAT97JG3eYrvzbMlG.1
>>     <https://cnrs.zoom.us/j/93123478759?pwd=CijFJxycChKygbAT97JG3eYrvzbMlG.1>
>>     /(//*Meeting ID:* 931 2347 8759 ; //*Passcode:* 85aNGH)/
>>
>>
>> Best regards,
>> Grégory and Joshua
>>
>>
>> On 25/04/2025 16:16, Gregory MANTELET wrote:
>>> Dear DAL members and DM chairs,
>>>
>>> In the IVOA and more specifically in DAL, we do not have yet a 
>>> stable solution
>>> to give access to spectral lines.
>>>
>>> For the record, REC-SLAP-1.0 
>>> <https://urldefense.com/v3/__https:/www.ivoa.net/documents/SLAP/20101209/index.html__;!!CrWY41Z8OgsX0i-WU-0LuAcUu2o!xXw1mHo0wm3raE559ej1IyKbxHBjoMMlryx6v15g6O7w1x8ZR81QKXwP1I5nlR7-UcBQXZvoXmRCCYatsYOGwMbd83I_vof7nqpG$> 
>>> (Simple Line Access Protocol) was published in
>>> 2010. Very few SLAP-1.0 services are available in the IVOA Registry. 
>>> It seems
>>> that the data model proposed by this protocol is not complete 
>>> enough: SSLDM-1.0 
>>> <https://urldefense.com/v3/__https:/www.ivoa.net/documents/SSLDM/20101209/index.html__;!!CrWY41Z8OgsX0i-WU-0LuAcUu2o!xXw1mHo0wm3raE559ej1IyKbxHBjoMMlryx6v15g6O7w1x8ZR81QKXwP1I5nlR7-UcBQXZvoXmRCCYatsYOGwMbd83I_vtjRWL8f$>.
>>> With the help of VAMDC, a second version has been proposed: SLAP-2.0 
>>> <https://urldefense.com/v3/__https:/www.ivoa.net/documents/SLAP/20190409/__;!!CrWY41Z8OgsX0i-WU-0LuAcUu2o!xXw1mHo0wm3raE559ej1IyKbxHBjoMMlryx6v15g6O7w1x8ZR81QKXwP1I5nlR7-UcBQXZvoXmRCCYatsYOGwMbd83I_vnbPwp32$>. 
>>> It is a
>>> Working Draft since 2019. In parallel SSLDM-2.0 
>>> <https://urldefense.com/v3/__https:/www.ivoa.net/documents/SSLDM/20190909/__;!!CrWY41Z8OgsX0i-WU-0LuAcUu2o!xXw1mHo0wm3raE559ej1IyKbxHBjoMMlryx6v15g6O7w1x8ZR81QKXwP1I5nlR7-UcBQXZvoXmRCCYatsYOGwMbd83I_vi9pVVfw$> 
>>> (also in 2019) is a Proposed
>>> Recommendation and reaches the RFC stage. Both have been frozen in 
>>> order to
>>> explore an alternative solution: LineTAP 
>>> <https://urldefense.com/v3/__https:/www.ivoa.net/documents/LineTAP/20241121/index.html__;!!CrWY41Z8OgsX0i-WU-0LuAcUu2o!xXw1mHo0wm3raE559ej1IyKbxHBjoMMlryx6v15g6O7w1x8ZR81QKXwP1I5nlR7-UcBQXZvoXmRCCYatsYOGwMbd83I_vm3C8Fl8$>. 
>>> It is based on TAP and defines a
>>> different and independent data model.
>>>
>>> It is now time to decide which protocol is the most helpful from the 
>>> point of
>>> view of data providers and users. This is the goal of the DAL 
>>> Running Meeting
>>> that Joshua and I are now proposing. Note that, as the main actors 
>>> for spectral
>>> lines, I had recently a meeting with VAMDC and CASSIS developer in 
>>> order to have
>>> their point of view and see what would be their preferred solution 
>>> and why. I
>>> will start the running meeting by giving conclusions of this side 
>>> meeting.
>>>
>>> @Mark, Mathieu: I invited both of you because providing spectral 
>>> lines implies
>>> data models and more specifically SSLDM. It would nice to have one 
>>> of you
>>> during this meeting.
>>>
>>> Anyway, in order to find the best possible date, please, answer to 
>>> the following poll
>>> before the 2nd of May:
>>>
>>> https://strawpoll.com/xVg716X0Qyr 
>>> <https://urldefense.com/v3/__https:/strawpoll.com/xVg716X0Qyr__;!!CrWY41Z8OgsX0i-WU-0LuAcUu2o!xXw1mHo0wm3raE559ej1IyKbxHBjoMMlryx6v15g6O7w1x8ZR81QKXwP1I5nlR7-UcBQXZvoXmRCCYatsYOGwMbd83I_vhVvE-8W$>
>>>
>>> As usual, this meeting will be one hour long and will be remote 
>>> (using Zoom).
>>>
>>> Best regards,
>>> Grégory and Joshua 
>>
>
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