B.1 GraphSON Data Format

The GraphSON file format is based on JavaScript Object Notation (JSON) for describing graphs.

• The first example in this topic shows a GraphSON description of the property graph shown in What Are Property Graphs?.

• The second example in this topic shows the GraphSON description of the same graph for Tinkerpop 3.

Example B-1 GraphSON Description of a Simple Property Graph

{
    "graph": {
        "mode":"NORMAL",
        "vertices": [
            {
                "name": "Alice",
                "age": 31,
                "_id": "1",
                "_type": "vertex"
            },
            {
                "name": "Bob",
                "age": 27,
                "_id": "2",
                "_type": "vertex"
            }       
        ],
        "edges": [
            {
                "type": "friends",
                "_id": "3",
                "_type": "edge",
                "_outV": "1",
                "_inV": "2",
                "_label": "knows"
            }
        ]
    }
}

Example B-2 GraphSON 3.0 Description of a Simple Property Graph

{"id":{"@type":"g:Int64","@value":1},"label":"person","outE":{"knows":[{"id":{"@type":"g:Int64","@value":3},"inV":{"@type":"g:Int64","@value":2},"properties":{"type":"friends"}}]},"properties":{"name":[{"id":{"@type":"g:Int64","@value":66724076},"value":"Alice"}],"age":[{"id":{"@type":"g:Int64","@value":96543},"value":{"@type":"g:Int32","@value":31}}]}}
{"id":{"@type":"g:Int64","@value":2},"label":"person","inE":{"knows":[{"id":{"@type":"g:Int64","@value":3},"outV":{"@type":"g:Int64","@value":1},"properties":{"type":"friends"}}]},"properties":{"name":[{"id":{"@type":"g:Int64","@value":3440674},"value":"Bob"}],"age":[{"id":{"@type":"g:Int64","@value":96540},"value":{"@type":"g:Int32","@value":27}}]}}

Methods are provided to import and export graphs from and into GraphSON format.

The following fragments of code show how to import and export GraphSON data in Tinkerpop 2 and Tinkerpop 3 versions. Note that the Tinkerpop 3 version has a “Tinkerpop3” suffix. This is to maintain backward compatibility.

// Get graph instance
OraclePropertyGraph opg = OraclePropertyGraph.getInstance(args, szGraphName);

// Import graph in GraphSON format
String fileName = "./mygraph.graphson";
PrintStream ps = new PrintStream("./output");
OraclePropertyGraphUtils.importGraphSON(opg,fileName,ps);

// Export graph into GraphSON format
String fileName = "./mygraph.graphson";
PrintStream ps = new PrintStream("./output");
OraclePropertyGraphUtils.exportGraphSON(opg,fileName,ps);

// Import graph into Tinkerpop 3 GraphSON format
String fileName = "./mygraphT3.graphson";
PrintStream ps = new PrintStream("./output");
OraclePropertyGraphUtils.importGraphSONTinkerpop3(opg,fileName,ps);

// Export graph into Tinkerpop 3 GraphSON format
String fileName = "./mygraphT3.graphson";
PrintStream ps = new PrintStream("./output");
OraclePropertyGraphUtils.exportGraphSONTinkerpop3(opg,fileName,ps);