DM Running Meeting notes - 20250916
CresitelloDittmar, Mark
mdittmar at cfa.harvard.edu
Thu Oct 30 21:26:02 CET 2025
Kelle,
I had to go back to the session recording as I couldn't take notes and run
the session.
The general opinion was basically:
o allow DATE-BEG = MJD-BEG = TSTART == different representations of the
datetime value for “Start date/time of observation”
o allow DATE-END = MJD-END = TSTOP == different representations of the
datetime value for “End date/time of observation”
o discourage or perhaps even disallow the use of DATE-OBS due to the
ambiguity of the definition and common usage.
o with minor splinter regarding the model element for 'mid-point of the
observation'; for which DATE-AVG would be the appropriate FITS 'DATE-*' key.
There was no real opinion expressed as to whether this is an enhancement
(v1.3) or can squeeze in as an erratum.
If we can make a definitive agreement to this on the Git Issue
<https://github.com/ivoa-std/SpectrumDM/issues/8>, we can see about closing
this out!
Mark
On Thu, Oct 30, 2025 at 3:19 PM Kelle Cruz <kellecruz at gmail.com> wrote:
> Regarding TODO for Spectrum and DATE-BEG/END: What *was* decided in
> Baltimore? Happy to help with this if needed.
>
> Kelle
>
> On Thu, Oct 30, 2025 at 2:17 PM CresitelloDittmar, Mark via dm <
> dm at ivoa.net> wrote:
>
>>
>> Attendees:
>>
>> - MS, MCD, LM, PD, ML, TD
>>
>>
>> Agenda:
>>
>> - Roadmap Goals:
>> - MANGO 1.0:
>> - In RFC: https://wiki.ivoa.net/twiki/bin/view/IVOA/Mango10RFC
>> - comments from DCP only
>> - observation time is complex object; proposal to replace
>> the 1 object with type attribute
>> - LM exercised it, works with vo-dml
>> - Merge request is open:
>> - *ACTION: MCD- review merge request and then LM
>> can move forward*
>> - datalink class
>> - added at beginning of document for static URLs;
>> - everyone is implementing datalink and it is
>> recommended to remove the class from the model.
>> - no replacement
>> - working implementation on Simbad
>> - TD: any potential issues? or looking good?
>> - LM: very simple to provide cone search annotated;
>> code is ready on his machine.. in discussion with Simbad people to put into
>> production
>> - possible interop presentation APPS
>> - CAOM2.5
>> - PD: over summer has spent time on CAOM document (2/3 done)
>> - should have time in next week or 2 to finish
>> (end-of-month) == ready to publish to document repo
>> - no time to dig into TD and HE extensions; anticipates HE
>> to be an effort
>> - PD: Question
>> - serialization of model (in XSD), this was part of the spec
>> itself.
>> - have XSD, and json serialization (not schema)…
>> - ML: Mango does not have a schema.. serialization is
>> expected to be via Annotation syntax.
>> - TD: should be brought up in the TCG.
>> - with multiple formats.. have to be all the more careful
>> and they NEED to be in sync.
>> - Q: is there a place in ivoa.net. for the json schema.?
>> - PD.. goals (last meeting)
>> - Document status?
>> - *TOPIC: Markup in VO-DML .. need a policy for this in
>> DM Working Group.*
>> - *no progress on that with PH*
>> - *Goals From Last meeting:*
>> - finish document
>> - review work Severin did, query CAOM holding CDC/MAST,
>> determine which fields in use in various fractions.. to identify usage
>> level of current fields..
>> - inform possible deprecations.
>> - new version of document in early summer
>> - working forward from there.. RFC for Fall seems viable
>> from document standpoint, but will need a lot of attention/review from
>> community.
>> - ObsCore 1.2 / Extensions:
>> - ML: had some comments from radio partners which are inserted
>> into the doc and a new version is available.
>> - ready to go for TCG review. (unofficial).
>> - *ACTION: touch base on how to proceed.*
>> - HEIG Note:
>> - CXC added X-Ray use cases
>> - MS/Bruno added (July) some content from Cherencov << on Git
>> repo. reviewing/integratiing comments from IE
>> - are vocabularies involved (non-ObsCore)
>> - IRF/RSF dependencies
>> - 3 Sections:
>> - ObsCore as now (with tweaked definitions)
>> - Extension Content for HE
>> - …
>> - ML:
>> - CfA group wants to distribute every file of interest,
>> along with event list
>> - discussing point that it is difficult to characterize
>> advanced data products..
>> - these are not direct observational data products - going
>> this way will make for very complex queries in ObsCore and therefoe not
>> serving the interests/intent of ObsCore.
>> - Do not see a clear use case for when searching for
>> advanced product (probability dist.) what path does the query take?
>> - from Observation (date/target) => see all analysis
>> products
>> - or direct query of the products
>> - DM WG Task
>> - Discuss where the proper place for their ‘proposals’ as
>> - TD: clarifying question
>> - the use cases themselves are describing a query which does
>> not start with the observation?
>> - PD: observable axis is a quite different thing in these
>> advanced products.. so maybe not obscore
>> - MIreille
>> - working modelio modeling
>> - would like to see some types in the Template (UCD, Units)
>> - for VO-DML 1.1: has the ivoa model extended to include these?
>> - PD: paul has integrated some of these into the ivoa model?
>> - ML: how do we proceed? Do we suggest extensions? This
>> should be distributed with vo-dml?
>> - PD: some add to ivoa base model (so trivial to reuse). Suggests
>> we try that and see how that works.
>> - Has some available.. can add as pull request for Vo-dml
>> - Spectrum
>> - file Erratum for VOCLASS issue
>> - follow-up on action for DATE-OBS issue: proposed additions of
>> DATE-BEG/END for alternative representation of this concept.
>> - *TODO: Implement what was decided in Baltimore. (MCD)MS, *
>> - Next Meeting:
>> - 3rd Tues = Oct 21 @20:00
>>
>>
>>
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