Proposed Schema Update: Target Keys should contain single value

[zkamvar]

(cross-posted from the hubverse mailing list)

Earlier this month at a hubverse developer’s meeting, we proposed the idea of updating the schema so the next version would require that target keys should contain a single value (i.e. target keys should be represented by a single column). Implementing this change would reduce unnecessary complexity in hub setups. We plan to release this version before the end of January.

To our knowledge, there are no public hubs that use multiple target keys. If you administer a hub that uses multiple target keys, please let me know and we will work with you to find a solution.

Issue in Schemas repository: hubverse-org/schemas#117
Decision record: https://github.com/reichlab/decisions/blob/main/decisions/2024-12-11-ldr-hubverse-target_keys.md