open world assumption

How to decide whether a federated SPARQL result is complete, incomplete or unknown: Darari et al. completeness statements, a query-level certificate, six failure tests and an 85% recall worked example, 2026.

OWL vs SHACL in 2026: classify requirements by entailment or graph acceptance, test missing and inconsistent values, and preserve a reproducible packet with explicit inference settings and expected reports.

A 2026 research guide to no-truth questions in data fusion, TEM source-quality assumptions, SF2013 F1 denominators, and a held-out test for candidate omission and correct abstention.

A 2026 evidence guide to open-world negation, explicit negative knowledge, five epistemic states, local closure, negative sampling, and evaluation protocols.