{
  "$schema": "http://json-schema.org/schema#",
  "id": "https://uri.etsi.org/ngsi-ld/schema/Entity.json",
  "title": "NGSI-LD Entity",
  "description": "NGSI-LD Entity",
  "definitions": {
    "LdContext": {
      "anyOf": [
        {
          "type": "object"
        },
        {
          "type": "string",
          "format": "uri"
        },
        {
          "type": "array",
          "items": {
            "anyOf": [
              {
                "type": "string",
                "format": "uri"
              },
              {
                "type": "object"
              }
            ]
          }
        }
      ]
    },
    "Commons": {
      "type": "object",
      "properties": {
        "observedAt": {
          "type": "string",
          "format": "date-time"
        },
        "createdAt": {
          "type": "string",
          "format": "date-time"
        },
        "modifiedAt": {
          "type": "string",
          "format": "date-time"
        },
        "datasetId": {
          "type": "string",
          "format": "uri"
        },
        "instanceId": {
          "type": "string",
          "format": "uri"
        }
      }
    },
    "Property": {
      "allOf": [
        {
          "$ref": "#/definitions/Commons"
        },
        {
          "type": "object",
          "properties": {
            "type": {
              "type": "string",
              "const": "Property"
            },
            "value": {
              "type": "any"
            }
          },
          "required": [
            "type",
            "value"
          ],
          "additionalProperties": {
            "anyOf": [
              {
                "$ref": "#/definitions/Property"
              },
              {
                "$ref": "#/definitions/Relationship"
              }
            ]
          }
        }
      ]
    },
    "Relationship": {
      "allOf": [
        {
          "$ref": "#/definitions/Commons"
        },
        {
          "type": "object",
          "properties": {
            "type": {
              "type": "string",
              "const": "Relationship"
            },
            "object": {
              "type": "string",
              "format": "uri"
            }
          },
          "required": [
            "type",
            "object"
          ],
          "additionalProperties": {
            "anyOf": [
              {
                "$ref": "#/definitions/Property"
              },
              {
                "$ref": "#/definitions/Relationship"
              }
            ]
          }
        }
      ]
    },
    "GeoProperty": {
      "allOf": [
        {
          "$ref": "#/definitions/Commons"
        },
        {
          "type": "object",
          "properties": {
            "type": {
              "type": "string",
              "const": "GeoProperty"
            },
            "value": {
              "$ref": "https://forge.etsi.org/gitlab/NGSI-LD/NGSI-LD/raw/master/schema/geometry-schema.json#"
            }
          },
          "required": [
            "type",
            "value"
          ],
          "additionalProperties": {
            "anyOf": [
              {
                "$ref": "#/definitions/Property"
              },
              {
                "$ref": "#/definitions/Relationship"
              }
            ]
          }
        }
      ]
    }
  },
  "type": "object",
  "properties": {
    "id": {
      "type": "string",
      "format": "uri"
    },
    "type": {
      "type": "string",
      "description": "NGSI Entity type"
    },
    "@context": {
      "$ref": "#/definitions/LdContext"
    },
    "location": {
      "$ref": "#/definitions/GeoProperty"
    },
    "observationSpace": {
      "$ref": "#/definitions/GeoProperty"
    },
    "operationSpace": {
      "$ref": "#/definitions/GeoProperty"
    }
  },
  "required": [
    "id",
    "type"
  ],
  "additionalProperties": {
    "anyOf": [
      {
        "$ref": "#/definitions/Property"
      },
      {
        "$ref": "#/definitions/Relationship"
      },
      {
        "$ref": "#/definitions/GeoProperty"
      }
    ]
  }
}