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schema.json
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schema.json
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{
"title": "Thing Description",
"version": "1.1-05-September-2022",
"description": "JSON Schema for validating TD instances against the TD information model. TD instances can be with or without terms that have default values",
"$schema": "http://json-schema.org/draft-07/schema#",
"$id":"https://raw.githubusercontent.com/w3c/wot-thing-description/main/validation/td-json-schema-validation.json",
"definitions": {
"anyUri": {
"type": "string"
},
"description": {
"type": "string"
},
"descriptions": {
"type": "object",
"additionalProperties": {
"type": "string"
}
},
"title": {
"type": "string"
},
"titles": {
"type": "object",
"additionalProperties": {
"type": "string"
}
},
"security": {
"oneOf": [
{
"type": "array",
"items": {
"type": "string"
},
"minItems":1
},
{
"type": "string"
}
]
},
"scopes": {
"oneOf": [
{
"type": "array",
"items": {
"type": "string"
}
},
{
"type": "string"
}
]
},
"subprotocol": {
"type": "string",
"examples": [
"longpoll",
"websub",
"sse"
]
},
"thing-context-td-uri-v1": {
"type": "string",
"const": "https://www.w3.org/2019/wot/td/v1"
},
"thing-context-td-uri-v1.1": {
"type": "string",
"const": "https://www.w3.org/2022/wot/td/v1.1"
},
"thing-context-td-uri-temp": {
"type": "string",
"const": "http://www.w3.org/ns/td"
},
"thing-context": {
"anyOf": [
{
"$comment":"New context URI with other vocabularies after it but not the old one",
"type": "array",
"items": [
{
"$ref": "#/definitions/thing-context-td-uri-v1.1"
}
],
"additionalItems": {
"anyOf": [
{
"$ref": "#/definitions/anyUri"
},
{
"type": "object"
}
],
"not":{
"$ref": "#/definitions/thing-context-td-uri-v1"
}
}
},
{
"$comment":"Only the new context URI",
"$ref": "#/definitions/thing-context-td-uri-v1.1"
},
{
"$comment":"Old context URI, followed by the new one and possibly other vocabularies. minItems and contains are required since prefixItems does not say all items should be provided",
"type": "array",
"prefixItems": [
{
"$ref": "#/definitions/thing-context-td-uri-v1"
},
{
"$ref": "#/definitions/thing-context-td-uri-v1.1"
}
],
"minItems":2,
"contains":{
"$ref": "#/definitions/thing-context-td-uri-v1.1"
},
"additionalItems": {
"anyOf": [
{
"$ref": "#/definitions/anyUri"
},
{
"type": "object"
}
]
}
},
{
"$comment": "Old context URI, followed by possibly other vocabularies. minItems and contains are required since prefixItems does not say all items should be provided",
"type": "array",
"prefixItems": [{
"$ref": "#/definitions/thing-context-td-uri-v1"
}],
"minItems": 1,
"contains": {
"$ref": "#/definitions/thing-context-td-uri-v1"
},
"additionalItems": {
"anyOf": [{
"$ref": "#/definitions/anyUri"
},
{
"type": "object"
}
]
}
},
{
"$comment":"Only the old context URI",
"$ref": "#/definitions/thing-context-td-uri-v1"
}
]
},
"bcp47_string":{
"type":"string",
"pattern": "^(((([A-Za-z]{2,3}(-([A-Za-z]{3}(-[A-Za-z]{3}){0,2}))?)|[A-Za-z]{4}|[A-Za-z]{5,8})(-([A-Za-z]{4}))?(-([A-Za-z]{2}|[0-9]{3}))?(-([A-Za-z0-9]{5,8}|[0-9][A-Za-z0-9]{3}))*(-([0-9A-WY-Za-wy-z](-[A-Za-z0-9]{2,8})+))*(-(x(-[A-Za-z0-9]{1,8})+))?)|(x(-[A-Za-z0-9]{1,8})+)|((en-GB-oed|i-ami|i-bnn|i-default|i-enochian|i-hak|i-klingon|i-lux|i-mingo|i-navajo|i-pwn|i-tao|i-tay|i-tsu|sgn-BE-FR|sgn-BE-NL|sgn-CH-DE)|(art-lojban|cel-gaulish|no-bok|no-nyn|zh-guoyu|zh-hakka|zh-min|zh-min-nan|zh-xiang)))$"
},
"type_declaration": {
"oneOf": [
{
"type": "string",
"not": {
"const": "tm:ThingModel"
}
},
{
"type": "array",
"items": {
"type": "string",
"not": {
"const": "tm:ThingModel"
}
}
}
]
},
"dataSchema-type": {
"type": "string",
"enum": [
"boolean",
"integer",
"number",
"string",
"object",
"array",
"null"
]
},
"dataSchema": {
"type": "object",
"properties": {
"@type": {
"$ref": "#/definitions/type_declaration"
},
"description": {
"$ref": "#/definitions/description"
},
"title": {
"$ref": "#/definitions/title"
},
"descriptions": {
"$ref": "#/definitions/descriptions"
},
"titles": {
"$ref": "#/definitions/titles"
},
"writeOnly": {
"type": "boolean"
},
"readOnly": {
"type": "boolean"
},
"oneOf": {
"type": "array",
"items": {
"$ref": "#/definitions/dataSchema"
}
},
"unit": {
"type": "string"
},
"enum": {
"type": "array",
"minItems": 1,
"uniqueItems": true
},
"format": {
"type": "string"
},
"const": {},
"default": {},
"contentEncoding": {
"type": "string"
},
"contentMediaType": {
"type": "string"
},
"type": {
"$ref": "#/definitions/dataSchema-type"
},
"items": {
"oneOf": [
{
"$ref": "#/definitions/dataSchema"
},
{
"type": "array",
"items": {
"$ref": "#/definitions/dataSchema"
}
}
]
},
"maxItems": {
"type": "integer",
"minimum": 0
},
"minItems": {
"type": "integer",
"minimum": 0
},
"minimum": {
"type": "number"
},
"maximum": {
"type": "number"
},
"exclusiveMinimum": {
"type": "number"
},
"exclusiveMaximum": {
"type": "number"
},
"minLength": {
"type": "integer",
"minimum": 0
},
"maxLength": {
"type": "integer",
"minimum": 0
},
"multipleOf": {
"$ref": "#/definitions/multipleOfDefinition"
},
"properties": {
"additionalProperties": {
"$ref": "#/definitions/dataSchema"
}
},
"required": {
"type": "array",
"items": {
"type": "string"
}
}
}
},
"additionalResponsesDefinition": {
"type": "array",
"items": {
"type": "object",
"properties": {
"contentType": {
"type": "string"
},
"schema": {
"type": "string"
},
"success": {
"type": "boolean"
}
}
}
},
"multipleOfDefinition": {
"type": [
"integer",
"number"
],
"exclusiveMinimum": 0
},
"expectedResponse": {
"type": "object",
"properties": {
"contentType": {
"type": "string"
}
},
"required": [
"contentType"
]
},
"form_element_base": {
"type": "object",
"properties": {
"op": {
"oneOf": [
{
"type": "string"
},
{
"type": "array",
"items": {
"type": "string"
}
}
]
},
"href": {
"$ref": "#/definitions/anyUri"
},
"contentType": {
"type": "string"
},
"contentCoding": {
"type": "string"
},
"subprotocol": {
"$ref": "#/definitions/subprotocol"
},
"security": {
"$ref": "#/definitions/security"
},
"scopes": {
"$ref": "#/definitions/scopes"
},
"response": {
"$ref": "#/definitions/expectedResponse"
},
"additionalResponses": {
"$ref": "#/definitions/additionalResponsesDefinition"
}
},
"required": [
"href"
],
"additionalProperties": true
},
"form_element_property": {
"allOf":[{"$ref":"#/definitions/form_element_base"}],
"type": "object",
"properties": {
"op": {
"oneOf": [
{
"type": "string",
"enum": [
"readproperty",
"writeproperty",
"observeproperty",
"unobserveproperty"
]
},
{
"type": "array",
"items": {
"type": "string",
"enum": [
"readproperty",
"writeproperty",
"observeproperty",
"unobserveproperty"
]
}
}
]
}
},
"additionalProperties": true
},
"form_element_action": {
"allOf":[{"$ref":"#/definitions/form_element_base"}],
"type": "object",
"properties": {
"op": {
"oneOf": [
{
"type": "string",
"enum": [
"invokeaction",
"queryaction",
"cancelaction"
]
},
{
"type": "array",
"items": {
"type": "string",
"enum": [
"invokeaction",
"queryaction",
"cancelaction"
]
}
}
]
}
},
"additionalProperties": true
},
"form_element_event": {
"allOf":[{"$ref":"#/definitions/form_element_base"}],
"type": "object",
"properties": {
"op": {
"oneOf": [
{
"type": "string",
"enum": [
"subscribeevent",
"unsubscribeevent"
]
},
{
"type": "array",
"items": {
"type": "string",
"enum": [
"subscribeevent",
"unsubscribeevent"
]
}
}
]
}
},
"additionalProperties": true
},
"form_element_root": {
"allOf":[{"$ref":"#/definitions/form_element_base"}],
"type": "object",
"properties": {
"op": {
"oneOf": [
{
"type": "string",
"enum": [
"readallproperties",
"writeallproperties",
"readmultipleproperties",
"writemultipleproperties",
"observeallproperties",
"unobserveallproperties",
"queryallactions",
"subscribeallevents",
"unsubscribeallevents"
]
},
{
"type": "array",
"items": {
"type": "string",
"enum": [
"readallproperties",
"writeallproperties",
"readmultipleproperties",
"writemultipleproperties",
"observeallproperties",
"unobserveallproperties",
"queryallactions",
"subscribeallevents",
"unsubscribeallevents"
]
}
}
]
}
},
"additionalProperties": true,
"required":["op"]
},
"form" : {
"$comment":"This is NOT for validation purposes but for automatic generation of TS types. For more info, please see: https://github.com/w3c/wot-thing-description/pull/1319#issuecomment-994950057",
"oneOf": [
{ "$ref" : "#/definitions/form_element_property" },
{ "$ref" : "#/definitions/form_element_action" },
{ "$ref" : "#/definitions/form_element_event" },
{ "$ref" : "#/definitions/form_element_root" }
]
},
"property_element": {
"type": "object",
"properties": {
"@type": {
"$ref": "#/definitions/type_declaration"
},
"description": {
"$ref": "#/definitions/description"
},
"descriptions": {
"$ref": "#/definitions/descriptions"
},
"title": {
"$ref": "#/definitions/title"
},
"titles": {
"$ref": "#/definitions/titles"
},
"forms": {
"type": "array",
"minItems": 1,
"items": {
"$ref": "#/definitions/form_element_property"
}
},
"uriVariables": {
"type": "object",
"additionalProperties": {
"$ref": "#/definitions/dataSchema"
}
},
"observable": {
"type": "boolean"
},
"writeOnly": {
"type": "boolean"
},
"readOnly": {
"type": "boolean"
},
"oneOf": {
"type": "array",
"items": {
"$ref": "#/definitions/dataSchema"
}
},
"unit": {
"type": "string"
},
"enum": {
"type": "array",
"minItems": 1,
"uniqueItems": true
},
"format": {
"type": "string"
},
"const": {},
"default": {},
"type": {
"$ref": "#/definitions/dataSchema-type"
},
"items": {
"oneOf": [
{
"$ref": "#/definitions/dataSchema"
},
{
"type": "array",
"items": {
"$ref": "#/definitions/dataSchema"
}
}
]
},
"maxItems": {
"type": "integer",
"minimum": 0
},
"minItems": {
"type": "integer",
"minimum": 0
},
"minimum": {
"type": "number"
},
"maximum": {
"type": "number"
},
"exclusiveMinimum": {
"type": "number"
},
"exclusiveMaximum": {
"type": "number"
},
"minLength": {
"type": "integer",
"minimum": 0
},
"maxLength": {
"type": "integer",
"minimum": 0
},
"multipleOf": {
"$ref": "#/definitions/multipleOfDefinition"
},
"properties": {
"additionalProperties": {
"$ref": "#/definitions/dataSchema"
}
},
"required": {
"type": "array",
"items": {
"type": "string"
}
}
},
"required": [
"forms"
],
"additionalProperties": true
},
"action_element": {
"type": "object",
"properties": {
"@type": {
"$ref": "#/definitions/type_declaration"
},
"description": {
"$ref": "#/definitions/description"
},
"descriptions": {
"$ref": "#/definitions/descriptions"
},
"title": {
"$ref": "#/definitions/title"
},
"titles": {
"$ref": "#/definitions/titles"
},
"forms": {
"type": "array",
"minItems": 1,
"items": {
"$ref": "#/definitions/form_element_action"
}
},
"uriVariables": {
"type": "object",
"additionalProperties": {
"$ref": "#/definitions/dataSchema"
}
},
"input": {
"$ref": "#/definitions/dataSchema"
},
"output": {
"$ref": "#/definitions/dataSchema"
},
"safe": {
"type": "boolean"
},
"idempotent": {
"type": "boolean"
},
"synchronous": {
"type": "boolean"
}
},
"required": [
"forms"
],
"additionalProperties": true
},
"event_element": {
"type": "object",
"properties": {
"@type": {
"$ref": "#/definitions/type_declaration"
},
"description": {
"$ref": "#/definitions/description"
},
"descriptions": {
"$ref": "#/definitions/descriptions"
},
"title": {
"$ref": "#/definitions/title"
},
"titles": {
"$ref": "#/definitions/titles"
},
"forms": {
"type": "array",
"minItems": 1,
"items": {
"$ref": "#/definitions/form_element_event"
}
},
"uriVariables": {
"type": "object",
"additionalProperties": {
"$ref": "#/definitions/dataSchema"
}
},
"subscription": {
"$ref": "#/definitions/dataSchema"
},
"data": {
"$ref": "#/definitions/dataSchema"
},
"dataResponse": {
"$ref": "#/definitions/dataSchema"
},
"cancellation": {
"$ref": "#/definitions/dataSchema"
}
},
"required": [
"forms"
],
"additionalProperties": true
},
"base_link_element": {
"type": "object",
"properties": {
"href": {
"$ref": "#/definitions/anyUri"
},
"type": {
"type": "string"
},
"rel": {
"type": "string"
},
"anchor": {
"$ref": "#/definitions/anyUri"
},
"hreflang": {
"anyOf":[
{"$ref": "#/definitions/bcp47_string"},
{
"type":"array",
"items":{
"$ref": "#/definitions/bcp47_string"
}
}
]
}
},
"required": [
"href"
],
"additionalProperties": true
},
"link_element": {
"allOf": [
{
"$ref": "#/definitions/base_link_element"
},
{
"not": {
"description": "A basic link element should not contain sizes",
"type": "object",
"properties": {
"sizes": {}
},
"required": [
"sizes"
]
}
},
{
"not": {
"description": "A basic link element should not contain icon or tm:extends",
"properties": {
"rel": {
"enum": [
"icon",
"tm:extends"
]
}
},
"required": [
"rel"
]
}
}
]
},
"icon_link_element": {
"allOf": [
{
"$ref": "#/definitions/base_link_element"
},
{
"properties": {
"rel": {
"const": "icon"
},
"sizes": {
"type": "string",
"pattern": "[0-9]*x[0-9]+"
}
},
"required": [
"rel"
]
}
]
},
"additionalSecurityScheme": {
"description": "Applies to additional SecuritySchemes not defined in the WoT TD specification.",
"$comment": "Additional SecuritySchemes should always be defined via a context extension, using a prefixed value for the scheme. This prefix (e.g. 'ace', see the example below) must contain at least one character in order to reference a valid JSON-LD context extension.",
"examples": [
{
"scheme": "ace:ACESecurityScheme",
"ace:as": "coaps://as.example.com/token",
"ace:audience": "coaps://rs.example.com",
"ace:scopes": ["limited", "special"],
"ace:cnonce": true
}
],
"type": "object",
"properties": {
"@type": {
"$ref": "#/definitions/type_declaration"
},
"description": {
"$ref": "#/definitions/description"
},
"descriptions": {
"$ref": "#/definitions/descriptions"
},
"proxy": {
"$ref": "#/definitions/anyUri"
},
"scheme": {
"type": "string",
"pattern": ".+:.*"
}
},
"required": [
"scheme"
],
"additionalProperties": true
},
"noSecurityScheme": {
"type": "object",
"properties": {
"@type": {
"$ref": "#/definitions/type_declaration"
},
"description": {
"$ref": "#/definitions/description"
},
"descriptions": {
"$ref": "#/definitions/descriptions"
},
"proxy": {
"$ref": "#/definitions/anyUri"
},
"scheme": {
"type": "string",
"enum": [
"nosec"
]
}
},
"required": [
"scheme"
],
"additionalProperties": true
},
"autoSecurityScheme": {
"type": "object",
"properties": {
"@type": {
"$ref": "#/definitions/type_declaration"
},
"description": {
"$ref": "#/definitions/description"
},
"descriptions": {
"$ref": "#/definitions/descriptions"
},
"proxy": {
"$ref": "#/definitions/anyUri"
},
"scheme": {
"type": "string",
"enum": [
"auto"
]
}
},
"not":{
"required":["name"]
},
"required": [
"scheme"
],
"additionalProperties": true
},
"comboSecurityScheme": {
"oneOf": [
{
"type": "object",
"properties": {
"@type": {
"$ref": "#/definitions/type_declaration"
},
"description": {
"$ref": "#/definitions/description"
},
"descriptions": {
"$ref": "#/definitions/descriptions"
},
"proxy": {
"$ref": "#/definitions/anyUri"
},
"scheme": {
"type": "string",
"enum": [
"combo"
]
},
"oneOf": {
"type": "array",
"minItems": 2,
"items": {
"type": "string"
}
}
},
"required": [
"scheme",
"oneOf"
],
"additionalProperties": true
},
{
"type": "object",
"properties": {
"@type": {
"$ref": "#/definitions/type_declaration"
},
"description": {
"$ref": "#/definitions/description"
},
"descriptions": {
"$ref": "#/definitions/descriptions"
},
"proxy": {
"$ref": "#/definitions/anyUri"
},
"scheme": {
"type": "string",
"enum": [
"combo"
]
},
"allOf": {
"type": "array",
"minItems": 2,
"items": {
"type": "string"
}
}
},
"required": [
"scheme",
"allOf"
],
"additionalProperties": true
}
]