ogbl-wikikg2

Predict missing heads or tails of Wikidata triples. Filtered MRR ranks each true entity against 500 sampled corrupt heads and 500 sampled corrupt tails that do not form known triples.

The graph contains 2,500,604 retained entities, 535 directed relation types, and 17,137,181 triples extracted from historical Wikidata dumps after filtering rare entities.

Entities are identifiers with learned representations in the standard task; no text or image features are supplied by the core artifact. Relations are typed directed edges.

Triples in the May 2015 snapshot train the model, additions present by August validate it, and additions by November form test. Only entities and relation types already present in May are retained.

Wikidata is incomplete and collaboratively edited, so an absent triple is not necessarily false. The predecessor ogbl-wikikg had a negative-sampling bug and is deprecated. Sampled MRR differs from ranking all entities, and inverse-relation augmentation changes the model input.