[
  {
    "context": "xtuple",
    "nameSpace": "XM",
    "type": "DocumentAssociation",
    "table": "xt.doc",
    "idSequenceName": "docass_docass_id_seq",
    "comment": "Document Association Map",
    "privileges": {
      "all": {
        "create": true,
        "read": true,
        "update": false,
        "delete": true
      }
    },
    "properties": [
      {
        "name": "id",
        "attr": {
          "type": "Number",
          "column": "id",
          "isPrimaryKey": true
        }
      },
      {
        "name": "uuid",
        "attr": {
          "type": "String",
          "column": "obj_uuid",
          "isNaturalKey": true
        }
      },
      {
        "name": "sourceType",
        "attr": {
          "type": "String",
          "column": "source_type"
        }
      },
      {
        "name": "source",
        "attr": {
          "type": "Number",
          "column": "source_id"
        }
      },
      {
        "name": "targetType",
        "attr": {
          "type": "String",
          "column": "target_type"
        }
      },
      {
        "name": "target",
        "attr": {
          "type": "Number",
          "column": "target_id"
        }
      },
      {
        "name": "purpose",
        "attr": {
          "type": "String",
          "column": "purpose"
        }
      }
    ],
    "isNestedOnly": true,
    "isSystem": true
  }
]