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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": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a59bykudnkgb0003"
  ],
  "id": "http://pasture-one-actor/actor/gb2l2tBiFVw",
  "published": "2025-03-12T10:23:36Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a59bykudnkgb0003"
    ],
    "id": "http://pasture-one-actor/actor/AWAUSEKE-9A",
    "published": "2025-03-12T10:23:36Z",
    "content": "valid uri",
    "inReplyTo": "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": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a59bykudnkgb0003"
  ],
  "id": "http://pasture-one-actor/actor/fxNm7xk55BM",
  "published": "2025-03-12T10:23:47Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a59bykudnkgb0003"
    ],
    "id": "http://pasture-one-actor/actor/py5cPctnwl0",
    "published": "2025-03-12T10:23:47Z",
    "content": "invalid uri",
    "inReplyTo": "http://invalid.example/"
  }
}

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": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a59bykudnkgb0003"
  ],
  "id": "http://pasture-one-actor/actor/NTfRmUUkfoA",
  "published": "2025-03-12T10:23:57Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a59bykudnkgb0003"
    ],
    "id": "http://pasture-one-actor/actor/Tl17Byt__uY",
    "published": "2025-03-12T10:23:57Z",
    "content": "list",
    "inReplyTo": [
      "http://pasture-one-actor/assets/note1.jsonap"
    ]
  }
}

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": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a59bykudnkgb0003"
  ],
  "id": "http://pasture-one-actor/actor/gdH8xFOJozg",
  "published": "2025-03-12T10:24:08Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a59bykudnkgb0003"
    ],
    "id": "http://pasture-one-actor/actor/PoS4Rvlv9Cw",
    "published": "2025-03-12T10:24:08Z",
    "content": "Link in inReplyTo",
    "inReplyTo": {
      "type": "Link",
      "href": "http://pasture-one-actor/assets/note1.jsonap"
    }
  }
}

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": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a59bykudnkgb0003"
  ],
  "id": "http://pasture-one-actor/actor/sLTtTIcfOP8",
  "published": "2025-03-12T10:24:19Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a59bykudnkgb0003"
    ],
    "id": "http://pasture-one-actor/actor/wVz06u8xKTk",
    "published": "2025-03-12T10:24:19Z",
    "content": "two elements in inReplyTo",
    "inReplyTo": [
      "http://pasture-one-actor/assets/note1.jsonap",
      "http://pasture-one-actor/assets/note2.jsonap"
    ]
  }
}

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": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a59bykudnkgb0003"
  ],
  "id": "http://pasture-one-actor/actor/DIERnQWNUaw",
  "published": "2025-03-12T10:24:30Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a59bykudnkgb0003"
    ],
    "id": "http://pasture-one-actor/actor/Pa8384eouSA",
    "published": "2025-03-12T10:24:30Z",
    "content": "collection",
    "inReplyTo": {
      "type": "Collection",
      "items": [
        "http://pasture-one-actor/actor"
      ]
    }
  }
}

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": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a59bykudnkgb0003"
  ],
  "id": "http://pasture-one-actor/actor/IEpuPuZtSyI",
  "published": "2025-03-12T10:24:40Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a59bykudnkgb0003"
    ],
    "id": "http://pasture-one-actor/actor/DK951mjvues",
    "published": "2025-03-12T10:24:40Z",
    "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"
    }
  }
}