SDC should follow standard URI pattern for RDF dumps, but it does not.
The latest config change in this area was https://gerrit.wikimedia.org/r/c/operations/mediawiki-config/+/609987/9/wmf-config/InitialiseSettings.php
Currently, wikidata's data and entity URI prefixes look like this:
```lang=turtle
@prefix wd: <http://www.wikidata.org/entity/> .
@prefix data: <https://www.wikidata.org/wiki/Special:EntityData/> .
```
Currently sdc has those prefixes.
```lang=turtle
@prefix sdc: <https://commons.wikimedia.org/wiki/Special:EntityData/> .
@prefix sdcdata: <https://commons.wikimedia.org/wiki/Special:EntityData/> .
```
With other prefixes build upon data prefix (or, as always, on entity prefix, but here they are identical).
sdc should be similar to wikidata:
```lang=turtle
@prefix sdc: <https://commons.wikimedia.org/entity/> .
@prefix sdcdata: <https://commons.wikimedia.org/wiki/Special:EntityData/> .
```
Note that other URI prefixes should follow suit. e.g. reified statement should be entity + "statement/".
The correct prefixes should be:
```lang=turtle
@prefix sdc: <https://commons.wikimedia.org/wiki/entity/> .
@prefix sdcdata: <https://commons.wikimedia.org/wiki/Special:EntityData/> .
@prefix sdcs: <https://commons.wikimedia.org/wiki/entity/statement/> .
@prefix sdcref: <https://commons.wikimedia.org/wiki/entity/reference/> .
@prefix sdcv: <https://commons.wikimedia.org/wiki/entity/value/> .
@prefix sdct: <https://commons.wikimedia.org/wiki/entity/prop/direct/> .
@prefix sdctn: <https://commons.wikimedia.org/wiki/entity/prop/direct-normalized/> .
@prefix sdcp: <https://commons.wikimedia.org/wiki/entity/prop/> .
@prefix sdcps: <https://commons.wikimedia.org/wiki/entity/prop/statement/> .
@prefix sdcpsv: <https://commons.wikimedia.org/wiki/entity/prop/statement/value/> .
@prefix sdcpsn: <https://commons.wikimedia.org/wiki/entity/prop/statement/value-normalized/> .
@prefix sdcpq: <https://commons.wikimedia.org/wiki/entity/prop/qualifier/> .
@prefix sdcpqv: <https://commons.wikimedia.org/wiki/entity/prop/qualifier/value/> .
@prefix sdcpqn: <https://commons.wikimedia.org/wiki/entity/prop/qualifier/value-normalized/> .
@prefix sdcpr: <https://commons.wikimedia.org/wiki/entity/prop/reference/> .
@prefix sdcprv: <https://commons.wikimedia.org/wiki/entity/prop/reference/value/> .
@prefix sdcprn: <https://commons.wikimedia.org/wiki/entity/prop/reference/value-normalized/> .
@prefix sdcno: <https://commons.wikimedia.org/wiki/entity/prop/novalue/> .
```
NT dumps are also affected.