A fully managed AWS graph database for enterprise workloads, supporting RDF with SPARQL 1.1 and property graphs via Gremlin and openCypher. It uses fault‑tolerant, self‑healing storage replicated across three Availability Zones and scales reads with up to 15 replicas, enabling low latency and very high throughput. OWL2 ontologies can be stored as RDF; full reasoning and SHACL/SPIN validation are typically integrated externally via dedicated engines or pipelines.