{
  "version": 1,
  "name": "A composite reference scheme",
  "objectTypes": [
    {
      "id": "room",
      "name": "Room",
      "kind": "entity"
    },
    {
      "id": "building",
      "name": "Building",
      "kind": "entity",
      "refMode": "nr"
    },
    {
      "id": "roomnr",
      "name": "RoomNr",
      "kind": "value",
      "dataType": "string"
    }
  ],
  "factTypes": [
    {
      "id": "isin",
      "roles": [
        {
          "id": "isin.r0",
          "objectTypeId": "room"
        },
        {
          "id": "isin.r1",
          "objectTypeId": "building"
        }
      ],
      "readings": [
        {
          "id": "isin.rd",
          "roleOrder": [
            "isin.r0",
            "isin.r1"
          ],
          "text": "{0} is in {1}",
          "isPrimary": true
        }
      ]
    },
    {
      "id": "hasnr",
      "roles": [
        {
          "id": "hasnr.r0",
          "objectTypeId": "room"
        },
        {
          "id": "hasnr.r1",
          "objectTypeId": "roomnr"
        }
      ],
      "readings": [
        {
          "id": "hasnr.rd",
          "roleOrder": [
            "hasnr.r0",
            "hasnr.r1"
          ],
          "text": "{0} has {1}",
          "isPrimary": true
        }
      ]
    }
  ],
  "subtypeRelations": [],
  "constraints": [
    {
      "id": "uc1",
      "kind": "uniqueness",
      "roles": [
        "isin.r0"
      ]
    },
    {
      "id": "mc1",
      "kind": "mandatory",
      "roles": [
        "isin.r0"
      ]
    },
    {
      "id": "uc2",
      "kind": "uniqueness",
      "roles": [
        "hasnr.r0"
      ]
    },
    {
      "id": "mc2",
      "kind": "mandatory",
      "roles": [
        "hasnr.r0"
      ]
    },
    {
      "id": "euc",
      "kind": "uniqueness",
      "roles": [
        "isin.r1",
        "hasnr.r1"
      ],
      "isPreferredIdentifier": true
    }
  ],
  "diagram": {
    "shapes": {
      "room": {
        "x": 40,
        "y": 110
      },
      "building": {
        "x": 330,
        "y": 20
      },
      "roomnr": {
        "x": 330,
        "y": 200
      },
      "isin": {
        "x": 200,
        "y": 28,
        "orientation": "horizontal"
      },
      "hasnr": {
        "x": 200,
        "y": 208,
        "orientation": "horizontal"
      },
      "euc": {
        "x": 300,
        "y": 120
      }
    }
  }
}