{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "anyOf": [
    {
      "$ref": "https://www.w3.org/2022/wot/td-schema/v1.1"
    }
  ],
  "definitions": {
    "modbusForm": {
      "type": "object",
      "properties": {
        "modv:pollingTime": { "type": "number", "minimum": 0 },
        "modv:entity": {
          "type": "string",
          "enum": ["Coil", "DiscreteInput", "HoldingRegister", "InputRegister"]
        },
        "modv:function": {
          "type": "string",
          "enum": [
            "readCoil",
            "readDiscreteInput",
            "readHoldingRegisters",
            "readInputRegisters",
            "writeSingleCoil",
            "writeMultipleCoils",
            "writeMultipleHoldingRegisters",
            "writeSingleHoldingRegister",
            "readFileRecord"
          ]
        },
        "modv:type": {
          "type": "string",
          "enum": [
            "xsd:integer",
            "xsd:boolean",
            "xsd:string",
            "xsd:float",
            "xsd:decimal",
            "xsd:byte",
            "xsd:short",
            "xsd:int",
            "xsd:long",
            "xsd:unsignedByte",
            "xsd:unsignedShort",
            "xsd:unsignedInt",
            "xsd:unsignedLong",
            "xsd:double",
            "xsd:hexBinary"
          ]
        },
        "modv:mostSignificantByte": { "type": "boolean" },
        "modv:mostSignificantWord": { "type": "boolean" },
        "modv:zeroBasedAddressing": { "type": "boolean" },
        "modv:timeout": { "type": "number", "minimum": 0 }
      }
    },
    "affordance": {
      "type": "object",
      "additionalProperties": {
        "type": "object",
        "properties": {
          "forms": {
            "type": "array",
            "items": {
              "$ref": "#/definitions/modbusForm"
            }
          }
        }
      }
    }
  },
  "type": "object",
  "properties": {
    "@context": {
      "type": "array",
      "contains": {
        "type": "object",
        "properties": {
          "modv": {
            "type": "string",
            "enum": ["https://www.w3.org/2019/wot/modbus"]
          }
        }
      }
    },
    "properties": {
      "$ref": "#/definitions/affordance"
    },
    "actions": {
      "$ref": "#/definitions/affordance"
    },
    "events": {
      "$ref": "#/definitions/affordance"
    }
  }
}