https://www.wikidata.org/wiki/Q123?action=constraintsrdf uses
prefix s: <http://www.wikidata.org/entity/statement/>
Either:
| Status | Subtype | Assigned | Task | ||
|---|---|---|---|---|---|
| Open | None | T244043 suggestions and possible decisions from the 2020 report on Property constraints | |||
| Open | None | T192565 Find constraint violations | |||
| Stalled | PRODUCTION ERROR | None | T212282 Timeout in Special Page Constraints check for France (Q142) | ||
| Stalled | None | T204024 Store WikibaseQualityConstraint check data in persistent storage instead of in the cache | |||
| Open | None | T214362 RFC: Store WikibaseQualityConstraint check data in persistent storage | |||
| Open | None | T297096 add prefix `s:` or replace it with `wds:` |
Prefixes are local to a single RDF document, there’s no requirement to use the same prefix names between different documents as far as I’m aware. I’m declining the “add to WDQS” option; I suppose it would be nice to use wds: in the output for consistency (mainly readability for humans), but I don’t think that’s anything above Lowest priority. (In particular, this doesn’t block T214362.)