{
  "type": "tradle.Model",
  "id": "tradle.BacklinkItem",
  "title": "Backlink Item",
  "properties": {
    "source": {
      "type": "object",
      "ref": "tradle.Object"
    },
    "target": {
      "type": "object",
      "ref": "tradle.Object"
    },
    "linkProp": {
      "type": "string",
      "description": "forward link property"
    }
  },
  "required": [
    "source",
    "target",
    "linkProp"
  ],
  "primaryKeys": {
    "hashKey": "target._permalink",
    "rangeKey": ["linkProp", "source._permalink"]
  },
  "indexes": [
    {
      "hashKey": "source._permalink",
      "rangeKey": ["linkProp", "target._permalink"]
    }
  ]
}