Is RDF a graph?

A graph consists of a set of vertices (nodes, points) and a set of edges (arcs, lines) between nodes. The common definition is  G = (V, E)  where V representes the set of vertices and E represents the edges between two vertices.

Commercially, there are two specific types of graph data models: Property Graph and RDF Graph.  A property graph is a graph where key-value pairs can be associated to vertices and edges. An RDF graph is a represented as a set of triples: subject, predicate, object where the subject and object are vertices and a predicate is an edge.

However, it seems that Jim Webber, Neo4J’s Chief Scientist does not acknowledge that RDF graphs are graphs:

My response and Jim’s follow up response:

and my response:

It is still unclear to me why Jim Webber believes RDF graphs are not graphs?

Jim, I’m in London this week. I would love to meetup, have a pint and chat about graphs!

One Reply to “Is RDF a graph?”

  1. RDF is more general than graphs, that is, it can code all graphs, and also things that are not graphs. It is thus sufficient for graphs. Any graph can be coded in RDF. And any RDF with predicates disjoint from resources will specify a graph. But any piece of RDF which violates that constraint will not be specifying a graph.

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