HEIG_25Feb11 < IVOA

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---+ HEIG Thematic Meeting on Obscore (online) - Tuesday Feb 11, 2025 @ 14:00 UTC

<br /><span data-mce-mark="1">%TOC%</span>
---++ Attendees
   * _Attendees_ : Bruno, Antara, Mark CD, Francesca, Francois, Ian, Jutta, Mark Kettenis, Mathieu, Mireille, Raffaele, Janet
   * _Regrets_ :
---++ Zoom

---++ Actions
   * *HEIG:* Initiate an Endorsed Note on Obscore with suggested keywords unique to HE, common and suggested for the core Obscore model, or in common with Radio from their document. 
   * *HEIG:* Stay focused on HE and work to encompass by defining the extension & core components for all of the data products that we want to be discoverable through the registry.
---++ Meeting Agenda
   * Meeting notes in *BOLD - currently just partially filled in (2/11)*
   * Obscore Reference docs
      1 Obscore v1.1 Standard (2017): https://www.ivoa.net/documents/ObsCore/
      1 Radio extension proposal (Nov24): [[https://github.com/ivoa-std/ObsCoreExtensionForRadioData][<span>https://github.com/ivoa-std/ObsCoreExtensionForRadioData</span>]]
      1 Time extension proposal (Jul24): [[https://github.com/ivoa-std/ObscoreTimeExtension?tab=readme-ov-file][https://github.com/ivoa-std/ObscoreTimeExtension]]
      1 Common Archive Observation Model (CAOM) Sep24 draft: https://www.ivoa.net/documents/CAOM/index.html
      1 X-ray Obscore working extension table (Jan25) - <a href="https://wiki.ivoa.net/internal/IVOA/HEIG_Winter25/HEIG_obscore_summary.pdf" target="_top">HEIG_obscore_summary.pdf</a>
      1 Analysis of Obscore for the VHE (May24) - [[%PUBURL%/IVOA/InterOpMay2024DM/2024-05-21_ObsCore_access_to_HESS_public_data_-_Servillat.pdf][IVOA Sydney, M. Servillat]] (slides 16-17)
   * Discuss current state of Obscore work and priority for HEIG, here's a shot at it ...
      * Registry and where it belongs in the scheme of things wrt Obscore
         * *We discussed that core keywords to Obscore would go in the Obscore standard and managed by DM; that information on the TAP service and how the registry is accessed will be directed to DAL; and that extensions unique to a waveband would be managed by the IGs in an Endorsed Note. Also note that along with Radio & HE, there is work ongoing for a Time extension.*
         * *Open questions for DAL: using extensions in parallel to the core ObsCore or incorporation of new keywords into ObsCore?*
      * Review HE drafty Obscore table
         * *Ian stepped through the table he organized; he emphasized that queries made by scientists needed to be straight forward for them to use the VO and benefit from this work; Vocabulary and UCD need to be also updated with the HE needs*
      * Review of Radio extension and overlap with keywords of interest to HE
         * *Bruno stepped through the Radio Draft document (#2 above) and highlighted the many overlaps with keywords of interest to TeV and HE data; he raised the question whether the keyword in the extension should not go into the core, generalising the definitions/descriptions; he noted that the "HE ObsCore extension" might be larger than the "radio ObsCore extension".*
         * *Mark K reminded us that there are several ObsCore inputs for one data product (PS from Bruno: which might be the case also for some TeV data providers)*
         * *We discussed about "GTI" (also known as Stable Time Intervals (STI)), for which the use cases differ depending on the data level. To be discussed in detail in a following meeting.*
   * Next steps:
      * *Compare the Radio extension(#2 above) to the HE working doc (#5 above). Does it add to the doc we have so far?*
      * *Write up the HE working table (#5 above) to be more definitive so folks can review and comment. Write it up in the form of a Note. Identify Core Obscore keywords and HE extension keywords. Have this doc ready for the Baltimore Interop.*
      * *Prepare with DM/DAL and plan a way forward at the next Interop. Is it a session, plenary, or pre-Interop meeting day on this topic??*
   * AOB
   * Next Mtg:

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Topic revision: r12 - 2025-02-19 - JanetEvans
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