VEP-004: #counterpart in datalink/core
Markus Demleitner
msdemlei at ari.uni-heidelberg.de
Fri Jun 26 10:08:12 CEST 2020
Dear DAL, Dear Semantics,
Thanks to François and Carlos, here's VEP-004, again proposing a
datalink term:
Vocabulary:http://ivoa.net/rdf/datalink/core
Author: François Bonnarel
Date: 2020-06-03
Supercedes: VEP-001
New Term: counterpart
Action: Addition
Label: Counterpart
Description:
Data products sharing the target of the experiment or observation
that led to #this but of unrelated provenance. This could be
observations of the same object in different wavelengths or along
different axes (time, spectrum), but spectra of dust of common
origin but different laboratories would be #counterparts as well.
Used-in:
Various SVO ConeSearch services (courtesy Carlos Rodrigo/SVO), for
instance
http://svo2.cab.inta-csic.es/vocats/catlib/dl.php?ID=Coma+T+102&from=cs
Rationale:
Astronomers often want to associate #this (astronomical objects,
sources or datasets ) with dataproducts of other provenance (but
sharing some common features with them). The purpose maybe for
comparison, cross-corelation, multi-band interpration, follow-up of
changes, checking simulations results versus observations.
Examples of that are measurements in another band, images, cubes,
spectra, timeseries of a source, same dataproduct type and location
in physical space but at another time, etc.
In discussions leading up to the VEP, several other terms have been
investigated and found inadequate. #see-also was considered much
too general, essentially applying to all datalink items; #followup did
not match the intended concept, as the linked data products may be
much older than #this; #cross-associated was considered in more
detail and might be a contender; #is-observation-of did not quite
fit because the #counterpart is not an observation of #this but
something observed by #this.
So... Comments? Opinions?
Thanks,
Markus
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