{
  "$schema": "http://json-schema.org/draft-06/schema#",
  "id": "http://adaptivecards.io/schemas/adaptive-card.json",
  "type": "object",
  "title": "Microsoft Adaptive Card Schema",
  "additionalProperties": true,
  "allOf": [
    {
      "$ref": "#/definitions/AdaptiveCard"
    }
  ],
  "properties": {
    "version": {
      "type": "string",
      "description": "Schema version that this card requires. If a client is **lower** than this version, the `fallbackText` will be rendered.",
      "examples": ["1.0", "1.1"]
    },
    "fallbackText": {
      "type": "string",
      "description": "Text shown when the client doesn't support the version specified (may contain markdown)."
    },
    "backgroundImage": {
      "type": "string",
      "description": "An image to use as the background of the card."
    },
    "speak": {
      "type": "string",
      "description": "Specifies what should be spoken for this entire card. This is simple text or SSML fragment."
    },
    "lang": {
      "type": "string",
      "description": "The 2-letter ISO-639-1 language used in the card. Used to localize any date/time functions.",
      "examples": ["en", "fr", "es"]
    }
  },
  "required": ["version"],
  "definitions": {
    "Action": {
      "anyOf": [
        {
          "$ref": "#/definitions/Action.Submit"
        },
        {
          "$ref": "#/definitions/Action.ShowCard"
        },
        {
          "$ref": "#/definitions/Action.OpenUrl"
        }
      ]
    },
    "Action.OpenUrl": {
      "additionalProperties": true,
      "description": "When invoked, show the given url either by launching it in an external web browser or showing in-situ with embedded web browser.",
      "properties": {
        "type": {
          "type": "string",
          "description": "Must be `\"Action.OpenUrl\"`."
        },
        "title": {
          "type": "string",
          "description": "Label for button or link that represents this action."
        },
        "iconUrl": {
          "type": "string",
          "format": "uri",
          "description": "Optional icon to be shown on the action in conjunction with the title",
          "version": "1.1"
        },
        "url": {
          "type": "string",
          "format": "uri",
          "description": "The URL to open."
        }
      },
      "required": ["type", "url"],
      "type": "object"
    },
    "Action.ShowCard": {
      "type": "object",
      "additionalProperties": true,
      "description": "Defines an AdaptiveCard which is shown to the user when the button or link is clicked.",
      "properties": {
        "type": {
          "type": "string",
          "description": "Must be `\"Action.ShowCard\"`."
        },
        "title": {
          "type": "string",
          "description": "Label for button or link that represents this action."
        },
        "iconUrl": {
          "type": "string",
          "format": "uri",
          "description": "Optional icon to be shown on the action in conjunction with the title",
          "version": "1.1"
        },
        "card": {
          "$ref": "#/definitions/AdaptiveCard"
        }
      },
      "required": ["type", "card"]
    },
    "Action.Submit": {
      "type": "object",
      "additionalProperties": true,
      "description": "Gathers input fields, merges with optional data field, and sends an event to the client. It is up to the client to determine how this data is processed. For example: With BotFramework bots, the client would send an activity through the messaging medium to the bot.",
      "properties": {
        "type": {
          "type": "string",
          "description": "Must be `\"Action.Submit\"`."
        },
        "title": {
          "type": "string",
          "description": "Label for button or link that represents this action."
        },
        "iconUrl": {
          "type": "string",
          "format": "uri",
          "description": "Optional icon to be shown on the action in conjunction with the title",
          "version": "1.1"
        },
        "data": {
          "type": ["string", "object"],
          "description": "Initial data that input fields will be combined with. These are essentially 'hidden' properties."
        }
      },
      "required": ["type"]
    },
    "Actions": {
      "additionalItems": true,
      "items": {
        "$ref": "#/definitions/Action"
      },
      "type": "array"
    },
    "AdaptiveCard": {
      "additionalProperties": true,
      "type": "object",
      "description": "Root element in an Adaptive Card.",
      "properties": {
        "type": {
          "type": "string",
          "description": "Must be `\"AdaptiveCard\"`.",
          "enum": ["AdaptiveCard"]
        },
        "actions": {
          "description": "The Actions to show in the card's action bar.",
          "$ref": "#/definitions/Actions"
        },
        "body": {
          "description": "The card elements to show in the primary card region.",
          "$ref": "#/definitions/CardElements"
        },
        "selectAction": {
          "description": "An Action that will be invoked when the card is tapped or selected. `Action.ShowCard` is not supported.",
          "type": "object",
          "oneOf": [
            { "$ref": "#/definitions/Action.Submit" },
            { "$ref": "#/definitions/Action.OpenUrl" }
          ]
        }
      },
      "required": ["type"]
    },
    "CardElement": {
      "additionalProperties": true,
      "properties": {
        "type": {
          "type": "string"
        },
        "id": {
          "type": "string",
          "description": "A unique identifier associated with the element."
        },
        "spacing": {
          "$ref": "#/definitions/SpacingStyle"
        },
        "separator": {
          "type": "boolean",
          "description": "When `true`, draw a separating line at the top of the element.",
          "default": false
        }
      },
      "required": ["type"]
    },
    "CardElements": {
      "type": "array",
      "additionalItems": true,
      "items": [
        {
          "anyOf": [
            {
              "$ref": "#/definitions/TextBlock"
            },
            {
              "$ref": "#/definitions/Media"
            },
            {
              "$ref": "#/definitions/Image"
            },
            {
              "$ref": "#/definitions/Container"
            },
            {
              "$ref": "#/definitions/ColumnSet"
            },
            {
              "$ref": "#/definitions/FactSet"
            },
            {
              "$ref": "#/definitions/ImageSet"
            },
            {
              "$ref": "#/definitions/Input.Text"
            },
            {
              "$ref": "#/definitions/Input.Number"
            },
            {
              "$ref": "#/definitions/Input.Date"
            },
            {
              "$ref": "#/definitions/Input.Time"
            },
            {
              "$ref": "#/definitions/Input.Toggle"
            },
            {
              "$ref": "#/definitions/Input.ChoiceSet"
            }
          ]
        }
      ]
    },
    "Input.Choice": {
      "type": "object",
      "description": "Describes a choice for use in a ChoiceSet.",
      "additionalProperties": true,
      "properties": {
        "type": {
          "type": "string",
          "enum": ["Input.Choice"]
        },
        "title": {
          "type": "string",
          "description": "Text to display."
        },
        "value": {
          "type": "string",
          "description": "The raw value for the choice. **NOTE:** do not use a `,` in the value, since a `ChoiceSet` with `isMultiSelect` set to `true` returns a comma-delimited string of choice values."
        }
      },
      "required": ["title", "value"]
    },
    "ChoiceInputStyle": {
      "type": "string",
      "description": "Style hint for `Input.ChoiceSet`.",
      "default": "compact",
      "enum": ["compact", "expanded"]
    },
    "Column": {
      "additionalProperties": true,
      "type": "object",
      "description": "Defines a container that is part of a ColumnSet.",
      "allOf": [
        {
          "$ref": "#/definitions/CardElement"
        }
      ],
      "properties": {
        "items": {
          "description": "The card elements to include in the `Column`.",
          "$ref": "#/definitions/CardElements"
        },
        "selectAction": {
          "description": "An Action that will be invoked when the `Column` is tapped or selected. `Action.ShowCard` is not supported.",
          "type": "object",
          "oneOf": [
            { "$ref": "#/definitions/Action.Submit" },
            { "$ref": "#/definitions/Action.OpenUrl" }
          ]
        },
        "style": {
          "type": "string",
          "description": "Style hint for `Column`.",
          "enum": ["default", "emphasis"]
        },
        "width": {
          "type": ["string", "number"],
          "description": "`\"auto\"`, `\"stretch\"`, or a number representing relative width of the column in the column group."
        },
        "type": {
          "type": "string",
          "description": "Must be `\"Column\"`.",
          "enum": ["Column"]
        }
      },
      "required": ["items"]
    },
    "ColumnSet": {
      "additionalProperties": true,
      "type": "object",
      "description": "ColumnSet divides a region into Columns, allowing elements to sit side-by-side.",
      "allOf": [
        {
          "$ref": "#/definitions/CardElement"
        }
      ],
      "properties": {
        "columns": {
          "type": "array",
          "description": "The array of `Columns` to divide the region into.",
          "items": {
            "$ref": "#/definitions/Column"
          }
        },
        "selectAction": {
          "description": "An Action that will be invoked when the `ColumnSet` is tapped or selected. `Action.ShowCard` is not supported.",
          "type": "object",
          "oneOf": [
            { "$ref": "#/definitions/Action.Submit" },
            { "$ref": "#/definitions/Action.OpenUrl" }
          ]
        },
        "type": {
          "type": "string",
          "description": "Must be `\"ColumnSet\"`.",
          "enum": ["ColumnSet"]
        }
      },
      "required": ["type"]
    },
    "Container": {
      "additionalProperties": true,
      "type": "object",
      "description": "Containers group items together.",
      "allOf": [
        {
          "$ref": "#/definitions/CardElement"
        }
      ],
      "properties": {
        "type": {
          "type": "string",
          "description": "Must be `\"Container\"`.",
          "enum": ["Container"]
        },
        "items": {
          "description": "The card elements to render inside the `Container`.",
          "$ref": "#/definitions/CardElements"
        },
        "selectAction": {
          "description": "An Action that will be invoked when the `Container` is tapped or selected. `Action.ShowCard` is not supported.",
          "type": "object",
          "oneOf": [
            { "$ref": "#/definitions/Action.Submit" },
            { "$ref": "#/definitions/Action.OpenUrl" }
          ]
        },
        "style": {
          "type": "string",
          "description": "Style hint for `Container`.",
          "enum": ["default", "emphasis"]
        },
        "verticalContentAlignment": {
          "type": "string",
          "description": "Defines how the content should be aligned vertically within the container.",
          "default": "top",
          "enum:": ["top", "center", "bottom"],
          "version": "1.1"
        }
      },
      "required": ["type", "items"]
    },
    "Fact": {
      "additionalProperties": true,
      "type": "object",
      "description": "Describes a Fact in a FactSet as a key/value pair.",
      "properties": {
        "type": {
          "type": "string",
          "enum": ["Fact"]
        },
        "title": {
          "type": "string",
          "description": "The title of the fact."
        },
        "value": {
          "type": "string",
          "description": "The value of the fact."
        }
      },
      "required": ["title", "value"]
    },
    "FactSet": {
      "additionalProperties": true,
      "type": "object",
      "description": "The FactSet element displays a series of facts (i.e. name/value pairs) in a tabular form.",
      "allOf": [
        {
          "$ref": "#/definitions/CardElement"
        }
      ],
      "properties": {
        "facts": {
          "type": "array",
          "description": "The array of `Fact`s.",
          "items": {
            "$ref": "#/definitions/Fact"
          }
        },
        "type": {
          "type": "string",
          "description": "Must be `\"FactSet\"`.",
          "enum": ["FactSet"]
        }
      },
      "required": ["type", "facts"]
    },
    "HorizontalAlignment": {
      "type": "string",
      "description": "Controls how elements are horizontally positioned within their container.",
      "default": "left",
      "enum": ["left", "center", "right"]
    },
    "MediaSource": {
      "additionalProperties": true,
      "type": "object",
      "description": "Defines a source for a Media element",
      "version": "1.1",
      "properties": {
        "mimeType": {
          "type": "string",
          "description": "Mime type of associated media (e.g. `\"video/mp4\"`)."
        },
        "url": {
          "type": "string",
          "format": "uri",
          "description": "URL to media."
        }
      },
      "required": ["mimeType", "url"]
    },
    "Media": {
      "additionalProperties": true,
      "type": "object",
      "description": "Displays a media player for audio or video content.",
      "version": "1.1",
      "allOf": [
        {
          "$ref": "#/definitions/CardElement"
        }
      ],
      "properties": {
        "type": {
          "type": "string",
          "description": "Must be `\"Media\"`.",
          "enum": ["Media"]
        },
        "sources": {
          "type": "array",
          "description": "Array of media sources to attempt to play.",
          "items": {
            "$ref": "#/definitions/MediaSource"
          }
        },
        "poster": {
          "type": "string",
          "format": "uri",
          "description": "URL of an image to display before playing."
        },
        "altText": {
          "type": "string",
          "description": "Alternate text describing the audio or video."
        }
      },
      "required": ["type"]
    },
    "Image": {
      "additionalProperties": true,
      "type": "object",
      "description": "Displays an image.",
      "allOf": [
        {
          "$ref": "#/definitions/CardElement"
        }
      ],
      "properties": {
        "altText": {
          "type": "string",
          "description": "Alternate text describing the image."
        },
        "horizontalAlignment": {
          "$ref": "#/definitions/HorizontalAlignment"
        },
        "selectAction": {
          "description": "An Action that will be invoked when the `Image` is tapped or selected. `Action.ShowCard` is not supported.",
          "type": "object",
          "oneOf": [
            { "$ref": "#/definitions/Action.Submit" },
            { "$ref": "#/definitions/Action.OpenUrl" }
          ]
        },
        "size": {
          "$ref": "#/definitions/ImageSize"
        },
        "style": {
          "$ref": "#/definitions/ImageStyle"
        },
        "type": {
          "type": "string",
          "description": "Must be `\"Image\"`.",
          "enum": ["Image"]
        },
        "url": {
          "type": "string",
          "format": "uri",
          "description": "The URL to the image."
        }
      },
      "required": ["type", "url"]
    },
    "ImageSet": {
      "additionalProperties": true,
      "type": "object",
      "description": "The ImageSet displays a collection of Images similar to a gallery.",
      "allOf": [
        {
          "$ref": "#/definitions/CardElement"
        }
      ],
      "properties": {
        "images": {
          "type": "array",
          "description": "The array of `Image` elements to show.",
          "items": {
            "$ref": "#/definitions/Image"
          }
        },
        "imageSize": {
          "$ref": "#/definitions/ImageSize"
        },
        "type": {
          "type": "string",
          "description": "Must be `\"ImageSet\"`.",
          "enum": ["ImageSet"]
        }
      },
      "required": ["type", "images"]
    },
    "ImageSize": {
      "type": "string",
      "description": "Controls the approximate size of the image. The physical dimensions will vary per host. Specify `\"auto\"` for true image dimension, or `\"stretch\"` to force it to fill the container.",
      "default": "auto",
      "enum": ["auto", "stretch", "small", "medium", "large"]
    },
    "ImageStyle": {
      "type": "string",
      "description": "Controls how this `Image` is displayed.",
      "enum": ["default", "person"]
    },
    "Input.ChoiceSet": {
      "additionalProperties": true,
      "type": "object",
      "description": "Allows a user to input a Choice.",
      "allOf": [
        {
          "$ref": "#/definitions/CardElement"
        }
      ],
      "properties": {
        "choices": {
          "type": "array",
          "description": "`Choice` options.",
          "items": {
            "$ref": "#/definitions/Input.Choice"
          }
        },
        "id": {
          "type": "string",
          "description": "Unique identifier for the value. Used to identify collected input when the Submit action is performed."
        },
        "isMultiSelect": {
          "type": "boolean",
          "description": "Allow multiple choices to be selected.",
          "default": false
        },
        "style": {
          "$ref": "#/definitions/ChoiceInputStyle"
        },
        "type": {
          "description": "Must be `\"Input.ChoiceInput\"`.",
          "enum": ["Input.ChoiceSet"],
          "type": "string"
        },
        "value": {
          "type": "string",
          "description": "The initial choice (or set of choices) that should be selected. For multi-select, specify a comma-separated string of values."
        }
      },
      "required": ["type", "id", "choices"]
    },
    "Input.Date": {
      "additionalProperties": true,
      "type": "object",
      "description": "Lets a user choose a date.",
      "allOf": [
        {
          "$ref": "#/definitions/CardElement"
        }
      ],
      "properties": {
        "id": {
          "type": "string",
          "description": "Unique identifier for the value. Used to identify collected input when the Submit action is performed."
        },
        "max": {
          "type": "string",
          "description": "Hint of maximum value expressed in ISO-8601 format (may be ignored by some clients)."
        },
        "min": {
          "type": "string",
          "description": "Hint of minimum value expressed in ISO-8601 format (may be ignored by some clients)."
        },
        "placeholder": {
          "type": "string",
          "description": "Description of the input desired. Displayed when no selection has been made."
        },
        "type": {
          "type": "string",
          "description": "Must be `\"Input.Date\"`.",
          "enum": ["Input.Date"]
        },
        "value": {
          "type": "string",
          "description": "The initial value for this field expressed in ISO-8601 format."
        }
      },
      "required": ["type", "id"]
    },
    "Input.Number": {
      "additionalProperties": true,
      "type": "object",
      "description": "Allows a user to enter a number.",
      "allOf": [
        {
          "$ref": "#/definitions/CardElement"
        }
      ],
      "properties": {
        "id": {
          "type": "string",
          "description": "Unique identifier for the value. Used to identify collected input when the Submit action is performed."
        },
        "max": {
          "type": "number",
          "description": "Hint of maximum value (may be ignored by some clients)."
        },
        "min": {
          "type": "number",
          "description": "Hint of minimum value (may be ignored by some clients)."
        },
        "placeholder": {
          "type": "string",
          "description": "Description of the input desired. Displayed when no selection has been made."
        },
        "type": {
          "type": "string",
          "description": "Must be `\"Input.Number\"`.",
          "enum": ["Input.Number"]
        },
        "value": {
          "type": "number",
          "description": "Initial value for this field."
        }
      },
      "required": ["type", "id"]
    },
    "Input.Text": {
      "additionalProperties": true,
      "type": "object",
      "description": "Lets a user enter text.",
      "allOf": [
        {
          "$ref": "#/definitions/CardElement"
        }
      ],
      "properties": {
        "id": {
          "type": "string",
          "description": "Unique identifier for the value. Used to identify collected input when the Submit action is performed."
        },
        "isMultiline": {
          "type": "boolean",
          "description": "If `true`, allow multiple lines of input.",
          "default": false
        },
        "maxLength": {
          "type": "number",
          "description": "Hint of maximum length characters to collect (may be ignored by some clients)."
        },
        "placeholder": {
          "type": "string",
          "description": "Description of the input desired. Displayed when no text has been input."
        },
        "style": {
          "$ref": "#/definitions/TextInputStyle"
        },
        "type": {
          "type": "string",
          "description": "Must be `\"Input.Text\"`.",
          "enum": ["Input.Text"]
        },
        "value": {
          "type": "string",
          "description": "The initial value for this field."
        }
      },
      "required": ["type", "id"]
    },
    "Input.Time": {
      "additionalProperties": true,
      "type": "object",
      "description": "Lets a user select a time.",
      "allOf": [
        {
          "$ref": "#/definitions/CardElement"
        }
      ],
      "properties": {
        "id": {
          "type": "string",
          "description": "Unique identifier for the value. Used to identify collected input when the Submit action is performed."
        },
        "max": {
          "type": "string",
          "description": "Hint of maximum value (may be ignored by some clients)."
        },
        "min": {
          "type": "string",
          "description": "Hint of minimum value (may be ignored by some clients)."
        },
        "placeholder": {
          "type": "string",
          "description": "Description of the input desired. Displayed when no time has been selected."
        },
        "type": {
          "type": "string",
          "description": "Must be `\"Input.Time\"`.",
          "enum": ["Input.Time"]
        },
        "value": {
          "type": "string",
          "description": "The initial value for this field expressed in ISO-8601 format."
        }
      },
      "required": ["type", "id"]
    },
    "Input.Toggle": {
      "additionalProperties": true,
      "type": "object",
      "description": "Lets a user choose between two options.",
      "allOf": [
        {
          "$ref": "#/definitions/CardElement"
        }
      ],
      "properties": {
        "id": {
          "type": "string",
          "description": "Unique identifier for the value. Used to identify collected input when the Submit action is performed."
        },
        "title": {
          "type": "string",
          "description": "Title for the toggle"
        },
        "type": {
          "type": "string",
          "description": "Input.Toggle",
          "enum": ["Input.Toggle"]
        },
        "value": {
          "type": "string",
          "description": "The current selected value. If the item is selected that \"valueOn\" will be used, otherwise \"valueOff\"",
          "default": "false"
        },
        "valueOff": {
          "type": "string",
          "description": "The value when toggle is off",
          "default": "false"
        },
        "valueOn": {
          "type": "string",
          "description": "The value when toggle is on",
          "default": "true"
        }
      },
      "required": ["type", "id", "title"]
    },
    "TextBlock": {
      "additionalProperties": true,
      "type": "object",
      "description": "Displays text, allowing control over font sizes, weight, and color.",
      "allOf": [
        {
          "$ref": "#/definitions/CardElement"
        }
      ],
      "properties": {
        "color": {
          "type": "string",
          "description": "Controls the color of `TextBlock` elements.",
          "enum": [
            "default",
            "dark",
            "light",
            "accent",
            "good",
            "warning",
            "attention"
          ]
        },
        "horizontalAlignment": {
          "$ref": "#/definitions/HorizontalAlignment"
        },
        "isSubtle": {
          "type": "boolean",
          "description": "If `true`, displays text slightly toned down to appear less prominent.",
          "default": false
        },
        "maxLines": {
          "type": "number",
          "description": "Specifies the maximum number of lines to display."
        },
        "size": {
          "type": "string",
          "description": "Controls size of text.",
          "enum": ["small", "default", "medium", "large", "extraLarge"]
        },
        "text": {
          "type": "string",
          "description": "Text to display."
        },
        "type": {
          "type": "string",
          "description": "Must be `\"TextBlock\"`.",
          "enum": ["TextBlock"]
        },
        "weight": {
          "type": "string",
          "description": "Controls the weight of `TextBlock` elements.",
          "enum": ["lighter", "default", "bolder"]
        },
        "wrap": {
          "type": "boolean",
          "description": "If `true`, allow text to wrap. Otherwise, text is clipped.",
          "default": false
        }
      },
      "required": ["type", "text"]
    },
    "SeparatorStyle": {
      "type": "object",
      "description": "Indicates whether there should be a visible separator (i.e. a line) between the element and its predecessor. If not specified, no separator is displayed. A separator will only be displayed if there is a preceding element.",
      "properties": {
        "thickness": {
          "type": "string",
          "description": "Specifies separator thickness.",
          "enum": ["default", "thick"]
        },
        "color": {
          "type": "string",
          "description": "Specifies separator color.",
          "enum": ["default", "accent"]
        }
      }
    },
    "SpacingStyle": {
      "type": "string",
      "description": "Controls the amount of spacing between this element and the preceding element.",
      "enum": [
        "none",
        "small",
        "default",
        "medium",
        "large",
        "extraLarge",
        "padding"
      ]
    },
    "TextInputStyle": {
      "type": "string",
      "default": "text",
      "description": "Style hint for `Input.Text`.",
      "enum": ["text", "tel", "url", "email"]
    }
  }
}