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Variations of inReplyTo

The property is defined here. The goal of this support table is to show how applications react to inReplyTo containing a wide variation of allowed objects. As Fediverse applications generally only give one the option to reply to a single element, the lacking support should not be surprising.

Examples

Example 1

activity
{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "http://misskey/users/a3ysx3jhjhiz0001",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/E-hp6lx48XQ",
  "published": "2025-02-07T20:48:39Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a3ysx3jhjhiz0001"
    ],
    "id": "http://pasture-one-actor/actor/x4ON_EManQc",
    "published": "2025-02-07T20:48:39Z",
    "content": "valid uri",
    "inReplyTo": "http://pasture-one-actor/assets/note1.jsonap"
  }
}
misskey
{
  "id": "a3yszejcpl2g0012",
  "createdAt": "2025-02-07T20:48:39.000Z",
  "userId": "a3ysz1b3pl2g0002",
  "user": {
    "id": "a3ysz1b3pl2g0002",
    "name": "Test Actor",
    "username": "actor",
    "host": "pasture-one-actor",
    "avatarUrl": "http://misskey/identicon/actor@pasture-one-actor",
    "avatarBlurhash": null,
    "avatarDecorations": [],
    "isBot": false,
    "isCat": false,
    "instance": {
      "name": null,
      "softwareName": null,
      "softwareVersion": null,
      "iconUrl": null,
      "faviconUrl": null,
      "themeColor": null
    },
    "emojis": {},
    "onlineStatus": "unknown"
  },
  "text": "valid uri",
  "cw": null,
  "visibility": "public",
  "localOnly": false,
  "reactionAcceptance": null,
  "renoteCount": 0,
  "repliesCount": 0,
  "reactionCount": 0,
  "reactions": {},
  "reactionEmojis": {},
  "emojis": {},
  "fileIds": [],
  "files": [],
  "replyId": "9o5nesfcpl2g0011",
  "renoteId": null,
  "uri": "http://pasture-one-actor/actor/x4ON_EManQc",
  "clippedCount": 0,
  "reply": {
    "id": "9o5nesfcpl2g0011",
    "createdAt": "2024-01-06T13:11:45.000Z",
    "userId": "a3ysz1b3pl2g0002",
    "user": {
      "id": "a3ysz1b3pl2g0002",
      "name": "Test Actor",
      "username": "actor",
      "host": "pasture-one-actor",
      "avatarUrl": "http://misskey/identicon/actor@pasture-one-actor",
      "avatarBlurhash": null,
      "avatarDecorations": [],
      "isBot": false,
      "isCat": false,
      "instance": {
        "name": null,
        "softwareName": null,
        "softwareVersion": null,
        "iconUrl": null,
        "faviconUrl": null,
        "themeColor": null
      },
      "emojis": {},
      "onlineStatus": "unknown"
    },
    "text": "One",
    "cw": null,
    "visibility": "public",
    "localOnly": false,
    "reactionAcceptance": null,
    "renoteCount": 0,
    "repliesCount": 1,
    "reactionCount": 0,
    "reactions": {},
    "reactionEmojis": {},
    "emojis": {},
    "fileIds": [],
    "files": [],
    "replyId": null,
    "renoteId": null,
    "uri": "http://pasture-one-actor/assets/note1.jsonap"
  }
}

Example 2

activity
{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "http://misskey/users/a3ysx3jhjhiz0001",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/s29OZOqnlwM",
  "published": "2025-02-07T20:48:39Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a3ysx3jhjhiz0001"
    ],
    "id": "http://pasture-one-actor/actor/1zLPWqBx6HQ",
    "published": "2025-02-07T20:48:39Z",
    "content": "invalid uri",
    "inReplyTo": "http://invalid.example/"
  }
}

no result

Example 3

activity
{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "http://misskey/users/a3ysx3jhjhiz0001",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/9NDMnJnPAQ4",
  "published": "2025-02-07T20:48:51Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a3ysx3jhjhiz0001"
    ],
    "id": "http://pasture-one-actor/actor/KXqK4_ycoKw",
    "published": "2025-02-07T20:48:51Z",
    "content": "list",
    "inReplyTo": [
      "http://pasture-one-actor/assets/note1.jsonap"
    ]
  }
}

no result

Example 4

activity
{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "http://misskey/users/a3ysx3jhjhiz0001",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/zuyy5KfEI0I",
  "published": "2025-02-07T20:49:03Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a3ysx3jhjhiz0001"
    ],
    "id": "http://pasture-one-actor/actor/s5BVrPoDLrM",
    "published": "2025-02-07T20:49:03Z",
    "content": "Link in inReplyTo",
    "inReplyTo": {
      "type": "Link",
      "href": "http://pasture-one-actor/assets/note1.jsonap"
    }
  }
}

no result

Example 5

activity
{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "http://misskey/users/a3ysx3jhjhiz0001",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/odlk8PqQm4E",
  "published": "2025-02-07T20:49:15Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a3ysx3jhjhiz0001"
    ],
    "id": "http://pasture-one-actor/actor/JSfGXM3M6t0",
    "published": "2025-02-07T20:49:15Z",
    "content": "two elements in inReplyTo",
    "inReplyTo": [
      "http://pasture-one-actor/assets/note1.jsonap",
      "http://pasture-one-actor/assets/note2.jsonap"
    ]
  }
}

no result

Example 6

activity
{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "http://misskey/users/a3ysx3jhjhiz0001",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/b9Gi39I1ywk",
  "published": "2025-02-07T20:49:26Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a3ysx3jhjhiz0001"
    ],
    "id": "http://pasture-one-actor/actor/8w2GavaPSMM",
    "published": "2025-02-07T20:49:26Z",
    "content": "collection",
    "inReplyTo": {
      "type": "Collection",
      "items": [
        "http://pasture-one-actor/actor"
      ]
    }
  }
}

no result

Example 7

activity
{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "http://misskey/users/a3ysx3jhjhiz0001",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/Y-k3QzQJcfE",
  "published": "2025-02-07T20:49:38Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a3ysx3jhjhiz0001"
    ],
    "id": "http://pasture-one-actor/actor/hwhQqpFVTJE",
    "published": "2025-02-07T20:49:38Z",
    "content": "embedded note",
    "inReplyTo": {
      "@context": "https://www.w3.org/ns/activitystreams",
      "type": "Note",
      "id": "http://pasture-one-actor/assets/note1.jsonap",
      "to": [
        "as:Public"
      ],
      "attributedTo": "http://pasture-one-actor/actor",
      "content": "One",
      "published": "2024-01-06T13:11:45Z"
    }
  }
}
misskey
{
  "id": "a3yt0o28pl2g0013",
  "createdAt": "2025-02-07T20:49:38.000Z",
  "userId": "a3ysz1b3pl2g0002",
  "user": {
    "id": "a3ysz1b3pl2g0002",
    "name": "Test Actor",
    "username": "actor",
    "host": "pasture-one-actor",
    "avatarUrl": "http://misskey/identicon/actor@pasture-one-actor",
    "avatarBlurhash": null,
    "avatarDecorations": [],
    "isBot": false,
    "isCat": false,
    "instance": {
      "name": null,
      "softwareName": null,
      "softwareVersion": null,
      "iconUrl": null,
      "faviconUrl": null,
      "themeColor": null
    },
    "emojis": {},
    "onlineStatus": "unknown"
  },
  "text": "embedded note",
  "cw": null,
  "visibility": "public",
  "localOnly": false,
  "reactionAcceptance": null,
  "renoteCount": 0,
  "repliesCount": 0,
  "reactionCount": 0,
  "reactions": {},
  "reactionEmojis": {},
  "emojis": {},
  "fileIds": [],
  "files": [],
  "replyId": "9o5nesfcpl2g0011",
  "renoteId": null,
  "uri": "http://pasture-one-actor/actor/hwhQqpFVTJE",
  "clippedCount": 0,
  "reply": {
    "id": "9o5nesfcpl2g0011",
    "createdAt": "2024-01-06T13:11:45.000Z",
    "userId": "a3ysz1b3pl2g0002",
    "user": {
      "id": "a3ysz1b3pl2g0002",
      "name": "Test Actor",
      "username": "actor",
      "host": "pasture-one-actor",
      "avatarUrl": "http://misskey/identicon/actor@pasture-one-actor",
      "avatarBlurhash": null,
      "avatarDecorations": [],
      "isBot": false,
      "isCat": false,
      "instance": {
        "name": null,
        "softwareName": null,
        "softwareVersion": null,
        "iconUrl": null,
        "faviconUrl": null,
        "themeColor": null
      },
      "emojis": {},
      "onlineStatus": "unknown"
    },
    "text": "One",
    "cw": null,
    "visibility": "public",
    "localOnly": false,
    "reactionAcceptance": null,
    "renoteCount": 0,
    "repliesCount": 2,
    "reactionCount": 0,
    "reactions": {},
    "reactionEmojis": {},
    "emojis": {},
    "fileIds": [],
    "files": [],
    "replyId": null,
    "renoteId": null,
    "uri": "http://pasture-one-actor/assets/note1.jsonap"
  }
}