Associated Attachments

Audio

Activity Vocabulary: Audio

Property	Base Spec	Required	Description	Restrictions
`type`	Activity Vocabulary 2.0	YES	Identifies the type of the object	MUST be set to `Audio`
`url`	Activity Vocabulary 2.0	YES	An array of links for given audio content in different formats	MUST be an Audio Link AND MUST have at least one supported audio MIME type
`name`	Activity Vocabulary 2.0	no	The display name for the audio file
`duration`	Activity Vocabulary 2.0	no	Approximate duration of the audio

Audio Link

Property	Base Spec	Required	Description	Restrictions
`type`	Activity Vocabulary 2.0	YES	Identifies the type of the object	MUST be set to `Link`
`href`	Activity Vocabulary 2.0	YES	The URL for the given audio content	MUST be a Supported URL Schema
`mediaType`	Activity Vocabulary 2.0	YES	MIME type of `href` content	MUST follow
`hash`	DSNP 1.0	YES	Array of hashes for linked content validation	MUST include at least one supported hash

Supported Audio MIME Types

Format	MIME Type	Specification(s)
MP3	`audio/mpeg`	RFC3003
OGG	`audio/ogg`	RFC5334
WebM	`audio/webm`	WebM standard

Example

{
  "@context": "https://www.w3.org/ns/activitystreams",
  "type": "Note",
  "attachments": [
    {
      "type": "Audio",
      "name": "The Scream",
      "url": [
        {
          "type": "Link",
          "href": "https://upload.wikimedia.org/wikipedia/commons/d/d9/Wilhelm_Scream.ogg",
          "mediaType": "audio/ogg",
          "hash": [
		    "QmQrGdv6Ky5sJhaVdw27y4aod5pdfihDkBTxiBkRaSGJJ7"
          ]
        }
      ],
      "duration": "1S"
    }
  ],
  "published": "1970-01-01T00:00:00+00:00"
}

Image

Activity Vocabulary: Image

Property	Base Spec	Required	Description	Restrictions
`type`	Activity Vocabulary 2.0	YES	Identifies the type of the object	MUST be set to `Image`
`url`	Activity Vocabulary 2.0	YES	An array of links for given image content in different formats	MUST be an Image Link AND MUST have at least one supported image MIME type
`name`	Activity Vocabulary 2.0	no	The display name or alt text for the image

Image Link

Property	Base Spec	Required	Description	Restrictions
`type`	Activity Vocabulary 2.0	YES	Identifies the type of the object	MUST be set to `Link`
`href`	Activity Vocabulary 2.0	YES	The URL for the given image	MUST be a Supported URL Schema
`mediaType`	Activity Vocabulary 2.0	YES	MIME type of `href` content
`hash`	DSNP 1.0	YES	Array of hashes for linked content validation	MUST include at least one supported hash
`height`	Activity Vocabulary 2.0	no	A hint as to the rendering height in device-independent pixels
`width`	Activity Vocabulary 2.0	no	A hint as to the rendering width in device-independent pixels

Supported Image MIME Types

Format	MIME Type	Specification(s)
JPEG	`image/jpeg`	RFC2045
PNG	`image/png`	W3C PNG Standard
SVG	`image/svg+xml`	W3C SVG standard
WebP	`image/webp`	WebP standard
GIF	`image/gif`	RFC2045

Example

{
  "@context": "https://www.w3.org/ns/activitystreams",
  "type": "Note",
  "attachments": [
    {
      "type": "Image",
      "name": "One of the founders of DSNP",
      "url": [
        {
          "type": "Link",
          "href": "https://upload.wikimedia.org/wikipedia/commons/a/ae/Mccourt.jpg",
          "width": 350,
          "height": 228,
          "mediaType": "image/jpg",
          "hash": [
            "2Drjgb5yoVWTpubcWmDBLJqkxrFkZamekzJoYLSWwM2ezpFkab"
          ]
        }
      ]
    }
  ],
  "published": "1970-01-01T00:00:00+00:00"
}

Video

Activity Vocabulary: Video

Property	Base Spec	Required	Description	Restrictions
`type`	Activity Vocabulary 2.0	YES	Identifies the type of the object	MUST be set to `Video`
`url`	Activity Vocabulary 2.0	YES	An array of links for given video content in different formats	MUST be a Video Link AND MUST have at least one supported video MIME type
`name`	Activity Vocabulary 2.0	no	The display name for the video
`duration`	Activity Vocabulary 2.0	no	Approximate duration of the video

Video Link

Property	Base Spec	Required	Description	Restrictions
`type`	Activity Vocabulary 2.0	YES	Identifies the type of the object	MUST be set to `Link`
`href`	Activity Vocabulary 2.0	YES	The URL for the given content	MUST be a Supported URL Schema
`mediaType`	Activity Vocabulary 2.0	YES	MIME type of `href` content
`hash`	DSNP 1.0	YES	Array of hashes for linked content validation	MUST include at least one supported hash
`height`	Activity Vocabulary 2.0	no	A hint as to the rendering height in device-independent pixels
`width`	Activity Vocabulary 2.0	no	A hint as to the rendering width in device-independent pixels

Supported Video MIME Types

Format	MIME Type	Specification(s)
MPEG	`video/mpeg`	RFC2045
OGG	`video/ogg`	RFC5334
WebM	`video/webm`	WebM standard
H265	`video/H265`	RFC7798
MP4	`video/mp4`	RFC4337

Example

{
  "@context": "https://www.w3.org/ns/activitystreams",
  "type": "Note",
  "attachments": [
    {
      "type": "Video",
      "name": "One of the founders of DSNP",
      "duration": "PT10M32S",
      "url": [
        {
          "type": "Link",
          "href": "https://upload.wikimedia.org/wikipedia/commons/c/c0/Big_Buck_Bunny_4K.webm",
          "width": 4000,
          "height": 2250,
          "mediaType": "video/webm",
          "hash": [
            "2Drjgb4a8eC4XheBKCBcbAcaVdEWcKjMbCSZ2L2c9CQs4x98jf"
          ]
        }
      ]
    }
  ],
  "published": "1970-01-01T00:00:00+00:00"
}

Link

Activity Vocabulary: Link

Property	Base Spec	Required	Description	Restrictions
`type`	Activity Vocabulary 2.0	YES	Identifies the type of the object	MUST be set to `Link`
`href`	Activity Vocabulary 2.0	YES	The URL for the given link	MUST be a Supported URL Schema
`name`	Activity Vocabulary 2.0	no	The display name for the link

Examples

{
  "@context": "https://www.w3.org/ns/activitystreams",
  "type": "Note",
  "content": "Check out the DSNP Website!",
  "mediaType": "text/plain",
  "attachment": [
    {
      "type": "Link",
      "name": "DSNP Website",
      "href": "https://dsnp.org"
    }
  ],
  "published": "1970-01-01T00:00:00+00:00"
}