{
	"$schema": "http://json-schema.org/draft-07/schema#",
	"type": "object",
	"description": "YAML schema for semantic convention generator, use for example with VS Code.",
	"additionalProperties": false,
	"properties": {
		"groups": {
			"type": "array",
			"items": {
				"anyOf": [
					{
						"allOf": [{"$ref": "#/definitions/SemanticConvention"}]
					},
					{
						"allOf": [{"$ref": "#/definitions/SpanSemanticConvention"}]
					},
					{
						"allOf": [{"$ref": "#/definitions/EventSemanticConvention"}]
					},
					{
						"allOf": [{"$ref": "#/definitions/MetricSemanticConvention"}]
					}
				]
			}
		}
	},
	"definitions": {
		"SemanticConventionBase": {
			"type": "object",
			"required": [
				"id",
				"brief"
			],
			"anyOf": [
				{
					"required": [
						"attributes"
					]
				},
				{
					"required": [
						"extends"
					]
				}
			],
			"properties": {
				"id": {
					"type": "string",
					"description": "unique string"
				},
				"type": {
					"type": "string",
					"enum": [
						"span",
						"resource",
						"metric",
						"event",
						"attribute_group"
					],
					"description": "The (signal) type of the semantic convention"
				},
				"brief": {
					"type": "string",
					"description": "a brief description of the semantic convention"
				},
				"note": {
					"type": "string",
					"description": "a more elaborate description of the semantic convention. It defaults to an empty string"
				},
				"prefix": {
					"type": "string",
					"description": "prefix of the attribute for this semconv. It defaults to an empty string."
				},
				"extends": {
					"type": "string",
					"description": "reference another semantic convention ID. It inherits all attributes from the specified semconv."
				},
				"attributes": {
					"type": "array",
					"items": {
						"$ref": "#/definitions/Attribute"
					},
					"description": "list of attributes that belong to the semconv"
				},
				"display_name": {
					"type": "string",
					"description": "the display name / title of the attribute group."
				}
			}
		},
		"SpanSemanticConvention": {
			"allOf": [{ "$ref": "#/definitions/SemanticConventionBase" }],
			"properties": {
				"type": {
					"type": "string",
					"const": "span"
				},
				"span_kind": {
					"type": "string",
					"enum": [
						"client",
						"server",
						"producer",
						"consumer",
						"internal"
					],
					"description": "specifies the kind of the span. Leaf semconv nodes (in the hierarchy tree) that do not have this field set will generate a warning."
				}
			}
		},
		"EventSemanticConvention": {
			"allOf": [{ "$ref": "#/definitions/SemanticConventionBase" }],
			"properties": {
				"type": {
					"type": "string",
					"const": "event"
				},
				"name": {
					"type": "string",
					"description": "The name of the event. Required if no prefix is given."
				}
			},
			"anyOf": [
				{"required": ["prefix"]},
				{"required": ["name"]}
			]
		},
		"MetricSemanticConvention": {
			"allOf": [{ "$ref": "#/definitions/SemanticConventionBase" }],
			"required": [
				"type",
				"metric_name",
				"instrument",
				"unit"
			],
			"properties": {
				"instrument": {
					"type": "string",
					"description": "The instrument used to record the metric.",
					"enum": [
						"counter",
						"gauge",
						"histogram",
						"updowncounter"
					]
				},
				"metric_name": {
					"type": "string",
					"description": "The name of the metric."
				},
				"type": {
					"type": "string",
					"const": "metric"
				},
				"unit": {
					"type": "string",
					"description": "The unit in which the metric is measured in."
				}
			}
		},
		"SemanticConvention": {
			"allOf": [{ "$ref": "#/definitions/SemanticConventionBase" }],
			"required": ["type"],
			"properties": {
				"type": {
					"type": "string",
					"not": {
						"enum": ["span", "event"]
					}
				}
			}
		},
		"AttributeEnumType": {
			"type": "object",
			"additionalProperties": false,
			"properties": {
				"allow_custom_values": {
					"type": "boolean"
				},
				"members": {
					"type": "array",
					"items": {
						"type": "object",
						"additionalProperties": false,
						"required": [
							"id",
							"value"
						],
						"properties": {
							"id": {
								"type": "string",
								"description": "string unique"
							},
							"value": {
								"type": [
									"string",
									"number"
								],
								"description": "string or number, value of the enum entry."
							},
							"brief": {
								"type": "string",
								"description": "brief description of the enum entry value. It defaults to the value of ID."
							},
							"note": {
								"type": "string",
								"description": "longer description. It defaults to an empty string."
							},
							"stability": {
								"allOf": [{ "$ref": "#/definitions/StabilityLevel" }]
							}
						}
					}
				}
			}
		},
		"AttributeFullSpec": {
			"required": [
				"id",
				"type"
			],
			"properties": {
				"id": {
					"type": "string",
					"description": "unique string"
				},
				"type": {
					"oneOf": [
						{
							"type": "string",
							"enum": [
								"string",
								"int",
								"double",
								"boolean",
								"string[]",
								"int[]",
								"double[]",
								"boolean[]",
								"template[string]",
								"template[int]",
								"template[double]",
								"template[boolean]",
								"template[string[]]",
								"template[int[]]",
								"template[double[]]",
								"template[boolean[]]"
							],
							"description": "literal denoting the type"
						},
						{
							"$ref": "#/definitions/AttributeEnumType"
						}
					]
				}
			}
		},
		"AttributeReference": {
			"type": "object",
			"required": [
				"ref"
			],
			"properties": {
				"ref": {
					"type": "string",
					"description": "reference an existing attribute"
				},
				"tag": {
					"type": "string",
					"description": "associates a tag to the attribute"
				}
			}
		},
		"ValueType": {
			"oneOf": [
				{
					"type": [
						"string",
						"boolean",
						"number"
					]
				},
				{
					"type": "array",
					"items": {
						"type": [
							"boolean",
							"number",
							"string"
						]
					}
				}
			]
		},
		"StabilityLevel": {
			"description": "specifies the stability level. Can be 'stable' or 'experimental' (the default).",
			"type": "string",
			"enum": [
				"stable",
				"experimental"
			]
		},
		"Attribute": {
			"type": "object",
			"allOf": [
				{
					"properties": {
						"requirement_level": {
							"description": "specifies the attribute requirement level. Can be 'required', 'conditionally_required', 'recommended', or 'opt_in'. When omitted, the attribute is 'recommended'. When set to 'conditionally_required', the string provided MUST specify the conditions under which the attribute is required.",
							"oneOf": [
								{
									"const": "required"
								},
								{
									"type": "object",
									"additionalProperties": false,
									"required": [
										"conditionally_required"
									],
									"properties": {
										"conditionally_required": {
											"type": "string"
										}
									}
								},
								{
									"oneOf": [
										{
											"const": "recommended"
										},
										{
											"type": "object",
											"additionalProperties": false,
											"required": [
												"recommended"
											],
											"properties": {
												"recommended": {
													"type": "string"
												}
											}
										}
									]
								},
								{
									"const": "opt_in"
								}
							]
						},
						"sampling_relevant": {
							"type": "boolean",
							"description": "specifies if it is relevant for sampling. It defaults to false.",
							"default": false
						},
						"brief": {
							"type": "string",
							"description": "brief description of the attribute."
						},
						"note": {
							"type": "string",
							"description": "additional notes to the attribute. It defaults to an empty string."
						},
						"examples": {
							"anyOf": [
								{ "$ref": "#/definitions/ValueType" },
								{
									"type": "array",
									"items": { "$ref": "#/definitions/ValueType" }
								}
							],
							"description": "sequence/dictionary of example values for the attribute. They are optional for boolean, int, double, and enum attributes. Example values must be of the same type of the attribute. If only a single example is provided, it can directly be reported without encapsulating it into a sequence/dictionary."
						},
						"deprecated": {
							"type": "string",
							"description": "specifies if the attribute is deprecated. The string provided as <description> MUST specify why it's deprecated and/or what to use instead."
						},
						"stability": {
							"allOf": [{ "$ref": "#/definitions/StabilityLevel" }]
						}
					}
				},
				{
					"oneOf": [
						{
							"$ref": "#/definitions/AttributeFullSpec"
						},
						{
							"$ref": "#/definitions/AttributeReference"
						}
					]
				}
			]
		}
	}
}