混合 Gremlin、OpenCypher 和 SPARQL

Question

AWS Neptune being on a lower level a triple-store (presumably a BlazeGraph fork), it can be queried via SPARQL. At the same time, one can use Gremlin and OpenCypher but as far as I can tell these do not access the triple data (and vice versa). That is, it looks like the property graph is separate from the triples. Is this correct or am I missing something obvious? Can one fetch property-graph data with SPARQL, can one query triples with Gremlin/OpenCypher?

Answer 1

Property Graph and RDF data are stored separately inside of Neptune. If you write data via the /sparql endpoint, it can then only be accessed via SPARQL thereafter. Similar situation if you write via the /gremlin or /oc endpoints, although Property Graph data can be simultaneously accessed via either Gremlin or openCypher.