{
  "id": "nested-instances",
  "revision": "4c53109051da3d8dcb2d15d243e93cb34d4b950a34b6c27ee55748e644f4ddd0",
  "regions": [
    {
      "id": "system",
      "label": "Reusable session definition"
    },
    {
      "id": "a",
      "label": "Activation A",
      "parent": "system"
    },
    {
      "id": "b",
      "label": "Activation B",
      "parent": "system"
    }
  ],
  "nodes": [
    {
      "id": "factory",
      "label": "Chat session factory",
      "kind": "N29",
      "region": "system",
      "ports": [
        {
          "id": "definition",
          "profile": "P23",
          "contract": "ChatDefinitionV1",
          "polarity": "Offer"
        }
      ]
    },
    {
      "id": "a",
      "label": "Conversation actor A",
      "kind": "N05",
      "region": "a",
      "ports": [
        {
          "id": "activation",
          "profile": "P21",
          "contract": "ChatDefinitionV1",
          "polarity": "Require"
        }
      ]
    },
    {
      "id": "b",
      "label": "Conversation actor B",
      "kind": "N05",
      "region": "b",
      "ports": [
        {
          "id": "activation",
          "profile": "P21",
          "contract": "ChatDefinitionV1",
          "polarity": "Require"
        }
      ]
    }
  ],
  "relations": [
    {
      "id": "instantiate",
      "kind": "H20",
      "incidences": [
        {
          "node": "factory",
          "port": "definition",
          "role": "definition",
          "ordinal": 0
        },
        {
          "node": "a",
          "port": "activation",
          "role": "instance",
          "ordinal": 0
        },
        {
          "node": "b",
          "port": "activation",
          "role": "instance",
          "ordinal": 1
        }
      ]
    }
  ]
}