data.json

{
    "nodes": [
      {
        "id": "n0",
        "label": "A node",
        "x": 0,
        "y": 0,
        "size": 3
        
      },
      {
        "id": "n1",
        "label": "Another node",
        "x": 3,
        "y": 1,
        "size": 2
      },
      {
        "id": "n2",
        "label": "And a last one",
        "x": 1,
        "y": 3,
        "size": 4
      },
      {
        "id": "n4",
        "label": "And a last one",
        "x": 4,
        "y": 3,
        "size": 3
      }
    ],
    "edges": [
      {
        "id": "e0",
        "source": "n0",
        "target": "n1",
        "type": "curve"
      },
      
      {
        "id": "e1",
        "source": "n1",
        "target": "n2",
        "type": "dotted"
      },
      {
        "id": "e2",
        "source": "n2",
        "target": "n0",
        "type": "curve"
      },
      {
        "id": "e4",
        "source": "n2",
        "target": "n4",
        "type": "curve"
      }
    ]
  }