{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "anyOf": [
    {
      "$ref": "https://raw.githubusercontent.com/w3c/wot-thing-description/main/validation/td-json-schema-validation.json"
    }
  ],
  "definitions": {
    "unsignedInt": {
      "type": "integer",
      "minimum": 0
    },
    "blockWiseValues": {
      "type": "integer",
      "enum": [16, 32, 64, 128, 256, 512, 1024]
    },
    "blockWiseTransferParameters": {
      "type": "object",
      "properties": {
        "cov:block2Size": {
          "$ref": "#/definitions/blockWiseValues"
        },
        "cov:block1Size": {
          "$ref": "#/definitions/blockWiseValues"
        }
      }
    },
    "coapResponse": {
      "type": "object",
      "properties": {
        "cov:contentFormat": {
          "$ref": "#/definitions/unsignedInt"
        }
      }
    },
    "coapForm": {
      "type": "object",
      "properties": {
        "cov:method:": {
          "type": "string",
          "enum": ["GET", "PUT", "POST", "DELETE", "FETCH", "iPATCH", "PATCH"],
          "$comment": "Might be extended by additional CoAP RFCs in the future."
        },
        "cov:minPollingInterval": {
          "$ref": "#/definitions/unsignedInt"
        },
        "cov:blockwise": {
          "$ref": "#/definitions/blockWiseTransferParameters"
        },
        "cov:qblockwise": {
          "$ref": "#/definitions/blockWiseTransferParameters"
        },
        "cov:contentFormat": {
          "$ref": "#/definitions/unsignedInt"
        },
        "cov:accept": {
          "$ref": "#/definitions/unsignedInt"
        },
        "cov:hopLimit": {
          "$ref": "#/definitions/unsignedInt"
        },
        "response": {
          "$ref": "#/definitions/coapResponse"
        },
        "additionalResponses": {
          "type": "array",
          "items": [
            {
              "$ref": "#/definitions/coapResponse"
            }
          ]
        }
      }
    },
    "affordance": {
      "type": "object",
      "additionalProperties": {
        "type": "object",
        "properties": {
          "forms": {
            "type": "array",
            "items": {
              "$ref": "#/definitions/coapForm"
            }
          }
        }
      }
    }
  },
  "type": "object",
  "properties": {
    "@context": {
      "type": "array",
      "contains": {
        "type": "object",
        "properties": {
          "cov": {
            "type": "string",
            "enum": ["https://www.w3.org/2019/wot/coap"],
            "$comment": "TODO: @context link needs to be updated."
          }
        }
      }
    },
    "properties": {
      "$ref": "#/definitions/affordance"
    },
    "actions": {
      "$ref": "#/definitions/affordance"
    },
    "events": {
      "$ref": "#/definitions/affordance"
    }
  }
}