DAL Running Meeting #20 - Spectral lines

[Gregory MANTELET]

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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