Graph databases are on an upswing in enterprise IT right now. What are the prerequisites for selection a graph query language in the first place?

Graph Node defines a store abstraction that they implement using Postgres: "Everything you need to run a subgraph is open source. Right now, we use Postgres under the hood as the storage engine.

The International Standards Organization’s publication of a standard for the Graph Query Language earlier this month generated relatively little media interest, but executives at graph database ...