[Heig] vocabulary update: proposal for dataproduct_type update for high energy data : event-list definition and event-bundle

[Dr. Ian N. Evans]

Hi Markus,

See inline comments below.

> On Apr 30, 2025, at 08:41, Markus Demleitner via heig <heig at ivoa.net> wrote:
> 
> Dear Colleagues,
> 
> On Wed, Apr 30, 2025 at 10:11:37AM +0200, Bruno Khelifi via semantics wrote:
>>> hold or is it the other way round?
>> As a simple physicist, I do not know that means #skos:broader. In words, an
>> event-list is contained into an event-bundle, because
>> event-bundle=event-list+IRFs+provenance+etc
> 
> Well, I think that nails it, and it seems the relationship is that
> #event-bundle is a narrower term than both #event-list and *#irf.
> 
> If you find time this afternoon could you, together with Mireille,
> extend the VEP to include *#irf (or whatever; I suspect a different
> identifer and label would be great) as a second new term?
> As usual, try to make the definition as precise as possible; a few
> guidelines are available at
> 
> https://www.google.com/url?q=https://ivoa.net/documents/Vocabularies/20230206/REC-Vocabularies-2.1.html%23tth_sEc5.2.4&source=gmail-imap&ust=1746621951000000&usg=AOvVaw0eb8PiQQSIu04vBh6kFJJV
> 
> And then #event-bundle would also be narrower than *#irf.

As I mentioned previously, not all event bundles will include IRFs but may instead include other data products that may be used to construct an IRF.

The 1st draft of the HE ObsCore document suggests “response” instead of “irf” as a dataproduct_type, as response is a more general term (even across HE projects, the term IRF is not universally used).  “Response” is widely applicable across multiple wavebands.  For example, a point spread function is a type of response that is used across all wavebands.  Similarly, line spread function is a response used in UV through IR spectroscopy.  Given the broadness of the scope of response it’s not clear that it should be tied to event-bundle for consideration.

The 1st draft of the HE ObsCore document proposes several additional dataproduct_types that are needed for advanced data products that certainly have broader scope than just HE.


> 
> I suppose *#irf would only become relevant in a datalink document
> (the content_qualifier).  As I said, it would be *really* good if
> there was a datalilnk document online already that uses that term by
> the time we publish the VEP.  Any chance for that?  And can we have
> an #event-bundle in some obscore table, too?

Also as noted previously, we want the ability to be able to discover responses independently from other associated data products.  While responses may be linked to an event bundle using datalink, this will not always be the case.


> 
> Note that if you have publishable data of that kind but just don't
> have the resources to publish them right now, I'm happy to fill in and
> publish it on https://www.google.com/url?q=http://dc.g-vo.org&source=gmail-imap&ust=1746621951000000&usg=AOvVaw2v6-Oq415KEUt94McqqTER).
> 
> Thanks,
> 
>            Markus
> 
> -- 
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Thanks,
—Ian

—

Dr. Ian Evans
Astrophysicist
Chandra X-ray Center
Center for Astrophysics | Harvard & Smithsonian

Office: (617) 496 7846 | Cell: (617) 699 5152
60 Garden Street | MS 81 | Cambridge, MA 02138



 


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