{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "#/components/schemas/VariableDefinition",
  "title": "VariableDefinition",
  "type": "object",
  "required": [
    "name",
    "dataType"
  ],
  "properties": {
    "name": {
      "type": "string"
    },
    "dataType": {
      "type": "string",
      "enum": [
        "BOOLEAN",
        "INT",
        "LONG",
        "DOUBLE",
        "STRING",
        "BIG_STRING",
        "TIMESTAMP"
      ]
    },
    "unit": {
      "type": "string",
      "description": "Unit of measurement (e.g., \"\u00b0C\", \"bar\", \"rpm\")"
    },
    "searchable": {
      "type": "boolean",
      "default": false
    },
    "length": {
      "type": "integer",
      "description": "Max length for STRING type"
    },
    "defaultValue": {
      "description": "Default value for the variable",
      "oneOf": [
        {
          "type": "number"
        },
        {
          "type": "string"
        },
        {
          "type": "boolean"
        },
        {
          "type": "null"
        }
      ]
    },
    "qualityCode": {
      "type": "boolean",
      "description": "Whether OPC-UA quality codes are supported"
    }
  }
}