You can query node, edge, path by #Cypher to #GDB like #AgensGraph. #Path is a component of graph and is composed with nodes and edge. Path means set of relation like #join of #RDB. When a few of paths come together, those make a graph. But no-connected paths are not graph, just tree. A graph can have a circulation of relation that makes difference with tree. And circulation must be having some duplicates of same data.