Obscore 1.1 Next 
This topic collects proposals for modifications of the Obscore 1.1
specification.
 Proposed Features 
 Proposed Updates 
 Drop not-null requirement on obs_id 
Since it causes a rather significant load on implementors while no
operational benefit has been identified, we should drop the requirement
that obs_id is not NULL.
This has already been discussed in the context of the retired
ObsCore-1_1-Erratum-3; see
http://mail.ivoa.net/pipermail/dm/2022-December/006282.html and
references therein.