{
    "name": "OVN_Northbound",
    "tables": {
        "Logical_Switch": {
            "columns": {
                "router_port": {"type": {"key": {"type": "uuid",
                                                 "refTable": "Logical_Router_Port",
                                                 "refType": "strong"},
                                         "min": 0, "max": 1}},
                "external_ids": {
                    "type": {"key": "string", "value": "string",
                             "min": 0, "max": "unlimited"}}}},
        "Logical_Port": {
            "columns": {
                "lswitch": {"type": {"key": {"type": "uuid",
                                             "refTable": "Logical_Switch",
                                             "refType": "strong"}}},
                "name": {"type": "string"},
                "macs": {"type": {"key": "string",
                                  "min": 0,
                                  "max": "unlimited"}},
                "port_security": {"type": {"key": "string",
                                           "min": 0,
                                           "max": "unlimited"}},
                "up": {"type": {"key": "boolean", "min": 0, "max": 1}},
                "external_ids": {
                    "type": {"key": "string", "value": "string",
                             "min": 0, "max": "unlimited"}}},
            "indexes": [["name"]]},
        "ACL": {
            "columns": {
                "lswitch": {"type": {"key": {"type": "uuid",
                                             "refTable": "Logical_Switch",
                                             "refType": "strong"}}},
                "priority": {"type": {"key": {"type": "integer",
                                              "minInteger": 0,
                                              "maxInteger": 65535}}},
                "match": {"type": "string"},
                "action": {"type": {"key": {"type": "string",
                                            "enum": ["set", ["allow", "allow-related", "drop", "reject"]]}}},
                "log": {"type": "boolean"},
                "external_ids": {
                    "type": {"key": "string", "value": "string",
                             "min": 0, "max": "unlimited"}}}},
        "Logical_Router": {
            "columns": {
                "ip": {"type": "string"},
                "default_gw": {"type": {"key": "string", "min": 0, "max": 1}},
                "external_ids": {
                    "type": {"key": "string", "value": "string",
                             "min": 0, "max": "unlimited"}}}},
        "Logical_Router_Port": {
            "columns": {
                "router": {"type": {"key": {"type": "uuid",
                                            "refTable": "Logical_Router",
                                            "refType": "strong"}}},
                "network": {"type": "string"},
                "mac": {"type": "string"},
                "external_ids": {
                    "type": {"key": "string", "value": "string",
                             "min": 0, "max": "unlimited"}}}}},
    "version": "1.0.0"}