Necessary Properties

With this support table, we want to illustrate, which properties can be removed from an object, and still create an appropriate response. We note that the basic form of an object is

{
    "type": "Note",
    "attributedTo": "http://pasture_one_actor/actor",
    "to": [
      "as:Public",
      "http://mitra/users/admin"
    ],
    "id": "http://pasture_one_actor/actor/wFuWTn-8BiE",
    "published": "2023-11-28T11:38:15Z",
    "content": "All fields"
}

Support table

content	akkoma	firefish	mastodon 4.1	mastodon 4.2	mitra	sharkey	Example
All fields	✅	✅	✅	✅	✅	✅	Example 1
without id	❌	❌	❌	❌	❌	❌	Example 2
without published	❌	❌	❌	❌	❌	❌	Example 3
without attributedTo	❌	❌	✅	✅	❌	❌	Example 4
without type	❌	❌	❌	❌	❌	❌	Example 5

Examples

Example 1

activityakkomafirefishmastodon 4.1mastodon 4.2mitrasharkey

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture_one_actor/actor",
  "to": [
    "http://mastodon/users/hippo",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture_one_actor/actor/CtKT59OewFE",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture_one_actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://mastodon/users/hippo"
    ],
    "id": "http://pasture_one_actor/actor/NYWd4Pv6CGM",
    "published": "2024-02-03T09:52:55Z",
    "content": "All fields"
  }
}

{
  "poll": null,
  "quote_id": null,
  "pleroma": {
    "content": {
      "text/plain": "All fields"
    },
    "context": "http://pasture_one_actor/actor/T2BIveIE41w",
    "conversation_id": 1559808853,
    "direct_conversation_id": null,
    "emoji_reactions": [],
    "expires_at": null,
    "in_reply_to_account_acct": null,
    "local": false,
    "parent_visible": false,
    "pinned_at": null,
    "spoiler_text": {
      "text/plain": ""
    },
    "thread_muted": false
  },
  "muted": false,
  "text": null,
  "uri": "http://pasture_one_actor/actor/T2BIveIE41w",
  "content": "All fields",
  "quote": null,
  "spoiler_text": "",
  "in_reply_to_account_id": null,
  "id": "Ad1u3lROGrDaIRTVdA",
  "emojis": [],
  "created_at": "2023-12-21T09:17:35.000Z",
  "akkoma": {
    "source": null
  },
  "reblog": null,
  "pinned": false,
  "favourited": false,
  "edited_at": null,
  "favourites_count": 0,
  "replies_count": 0,
  "account": {
    "acct": "actor@pasture_one_actor",
    "akkoma": {
      "instance": {
        "favicon": null,
        "name": "pasture_one_actor",
        "nodeinfo": {}
      },
      "status_ttl_days": null
    },
    "avatar": "http://akkoma/images/avi.png",
    "avatar_static": "http://akkoma/images/avi.png",
    "bot": false,
    "created_at": "2023-12-18T16:32:33.000Z",
    "display_name": "Test Actor",
    "emojis": [],
    "fields": [],
    "followers_count": 0,
    "following_count": 0,
    "fqn": "actor@pasture_one_actor",
    "header": "http://akkoma/images/banner.png",
    "header_static": "http://akkoma/images/banner.png",
    "id": "AcwJKv0kdvMWFq5fo8",
    "last_status_at": "2023-12-21T09:17:36",
    "locked": false,
    "note": "",
    "pleroma": {
      "also_known_as": [],
      "ap_id": "http://pasture_one_actor/actor",
      "background_image": null,
      "favicon": null,
      "hide_favorites": true,
      "hide_followers": false,
      "hide_followers_count": false,
      "hide_follows": false,
      "hide_follows_count": false,
      "is_admin": false,
      "is_confirmed": true,
      "is_moderator": false,
      "is_suggested": false,
      "relationship": {},
      "skip_thread_containment": false,
      "tags": []
    },
    "source": {
      "fields": [],
      "note": "",
      "pleroma": {
        "actor_type": "Person",
        "discoverable": false
      },
      "sensitive": false
    },
    "statuses_count": 162,
    "url": "http://pasture_one_actor/actor",
    "username": "actor"
  },
  "media_attachments": [],
  "bookmarked": false,
  "url": "http://pasture_one_actor/actor/T2BIveIE41w",
  "language": null,
  "application": null,
  "sensitive": false,
  "visibility": "public",
  "card": null,
  "reblogged": false,
  "reblogs_count": 0,
  "in_reply_to_id": null,
  "emoji_reactions": [],
  "mentions": [
    {
      "acct": "admin",
      "id": "AcwFrrkmWtE9GiOT9U",
      "url": "http://akkoma/users/admin",
      "username": "admin"
    }
  ],
  "tags": []
}

{
  "id": "9na39x3kp8r0scec",
  "createdAt": "2023-12-15T11:07:14.000Z",
  "userId": "9n9wzlp9dblvlr0i",
  "user": {
    "id": "9n9wzlp9dblvlr0i",
    "name": "Test Actor",
    "username": "actor",
    "host": "pasture_one_actor",
    "avatarUrl": "http://firefish_web/identicon/9n9wzlp9dblvlr0i",
    "avatarBlurhash": null,
    "avatarColor": null,
    "isLocked": false,
    "speakAsCat": true,
    "instance": {
      "name": null,
      "softwareName": null,
      "softwareVersion": null,
      "iconUrl": null,
      "faviconUrl": null,
      "themeColor": null
    },
    "emojis": [],
    "onlineStatus": "unknown",
    "driveCapacityOverrideMb": null
  },
  "text": "All fields",
  "cw": null,
  "visibility": "specified",
  "visibleUserIds": [
    "9n9wxbguo109fa49"
  ],
  "renoteCount": 0,
  "repliesCount": 0,
  "reactions": {},
  "reactionEmojis": [],
  "emojis": [],
  "fileIds": [],
  "files": [],
  "replyId": null,
  "renoteId": null,
  "mentions": [
    "9n9wxbguo109fa49"
  ],
  "uri": "http://pasture_one_actor/actor/Ha8lgOgfrJY"
}

{
  "id": "111584112481066013",
  "created_at": "2023-12-15T11:07:14.000Z",
  "in_reply_to_id": null,
  "in_reply_to_account_id": null,
  "sensitive": false,
  "spoiler_text": "",
  "visibility": "public",
  "language": null,
  "uri": "http://pasture_one_actor/actor/Ha8lgOgfrJY",
  "url": "http://pasture_one_actor/actor/Ha8lgOgfrJY",
  "replies_count": 0,
  "reblogs_count": 0,
  "favourites_count": 0,
  "edited_at": null,
  "favourited": false,
  "reblogged": false,
  "muted": false,
  "bookmarked": false,
  "content": "All fields",
  "filtered": [],
  "reblog": null,
  "account": {
    "id": "111353016223646385",
    "username": "actor",
    "acct": "actor@pasture_one_actor",
    "display_name": "Test Actor",
    "locked": false,
    "bot": false,
    "discoverable": false,
    "group": false,
    "created_at": "2023-11-04T00:00:00.000Z",
    "note": "",
    "url": "http://pasture_one_actor/actor",
    "avatar": "http://mastodon41web/avatars/original/missing.png",
    "avatar_static": "http://mastodon41web/avatars/original/missing.png",
    "header": "http://mastodon41web/headers/original/missing.png",
    "header_static": "http://mastodon41web/headers/original/missing.png",
    "followers_count": 0,
    "following_count": 0,
    "statuses_count": 941,
    "last_status_at": "2023-12-15",
    "emojis": [],
    "fields": []
  },
  "media_attachments": [],
  "mentions": [],
  "tags": [],
  "emojis": [],
  "card": null,
  "poll": null
}

{
  "id": "111866935767954735",
  "created_at": "2024-02-03T09:52:55.000Z",
  "in_reply_to_id": null,
  "in_reply_to_account_id": null,
  "sensitive": false,
  "spoiler_text": "",
  "visibility": "public",
  "language": null,
  "uri": "http://pasture_one_actor/actor/NYWd4Pv6CGM",
  "url": "http://pasture_one_actor/actor/NYWd4Pv6CGM",
  "replies_count": 0,
  "reblogs_count": 0,
  "favourites_count": 0,
  "edited_at": null,
  "favourited": false,
  "reblogged": false,
  "muted": false,
  "bookmarked": false,
  "content": "All fields",
  "filtered": [],
  "reblog": null,
  "account": {
    "id": "111866920163200046",
    "username": "actor",
    "acct": "actor@pasture_one_actor",
    "display_name": "Test Actor",
    "locked": false,
    "bot": false,
    "discoverable": false,
    "group": false,
    "created_at": "2024-02-03T00:00:00.000Z",
    "note": "",
    "url": "http://pasture_one_actor/actor",
    "uri": "http://pasture_one_actor/actor",
    "avatar": "http://mastodon/avatars/original/missing.png",
    "avatar_static": "http://mastodon/avatars/original/missing.png",
    "header": "http://mastodon/headers/original/missing.png",
    "header_static": "http://mastodon/headers/original/missing.png",
    "followers_count": 0,
    "following_count": 0,
    "statuses_count": 91,
    "last_status_at": "2024-02-03",
    "emojis": [],
    "fields": []
  },
  "media_attachments": [],
  "mentions": [],
  "tags": [],
  "emojis": [],
  "card": null,
  "poll": null
}

{
  "id": "018d312f-d788-1a65-0a49-3c3ab6081196",
  "uri": "http://pasture_one_actor/actor/aGv_1ix-bqc",
  "url": null,
  "created_at": "2024-01-22T12:40:30Z",
  "edited_at": null,
  "account": {
    "id": "018bed73-d3b0-86c0-8ab2-d8150467b635",
    "username": "actor",
    "acct": "actor@pasture_one_actor",
    "actor_id": "http://pasture_one_actor/actor",
    "url": "http://pasture_one_actor/actor",
    "display_name": "Test Actor",
    "created_at": "2023-11-20T15:57:52.944891Z",
    "note": "",
    "avatar": null,
    "header": null,
    "locked": false,
    "identity_proofs": [],
    "payment_options": [],
    "fields": [],
    "emojis": [],
    "followers_count": 0,
    "following_count": 0,
    "subscribers_count": 0,
    "statuses_count": 276,
    "source": null,
    "role": null,
    "authentication_methods": null,
    "client_config": null
  },
  "content": "All fields",
  "in_reply_to_id": null,
  "in_reply_to_account_id": null,
  "reblog": null,
  "visibility": "public",
  "sensitive": false,
  "spoiler_text": "",
  "pinned": false,
  "replies_count": 0,
  "favourites_count": 0,
  "reblogs_count": 0,
  "media_attachments": [],
  "mentions": [
    {
      "id": "018b37d3-6116-2b89-b259-447ae212e3fd",
      "username": "admin",
      "acct": "admin",
      "url": "http://mitra/users/admin"
    }
  ],
  "tags": [],
  "emojis": [],
  "favourited": false,
  "reblogged": false,
  "ipfs_cid": null,
  "token_id": null,
  "token_tx_id": null,
  "links": []
}

{
  "id": "9na39x3kr2cp002v",
  "uri": "http://pasture_one_actor/actor/Ha8lgOgfrJY",
  "url": "http://pasture_one_actor/actor/Ha8lgOgfrJY",
  "account": {
    "id": "9mvq3ljkmuna0003",
    "username": "actor",
    "acct": "actor@pasture_one_actor",
    "fqn": "actor@pasture_one_actor",
    "display_name": "Test Actor",
    "locked": false,
    "created_at": "2023-12-05T09:49:37.616Z",
    "followers_count": 0,
    "following_count": 0,
    "statuses_count": 145,
    "note": "",
    "url": "http://pasture_one_actor/actor",
    "uri": "http://pasture_one_actor/actor",
    "avatar": "https://dev.joinsharkey.org/static-assets/avatar.png",
    "avatar_static": "https://dev.joinsharkey.org/static-assets/avatar.png",
    "header": "https://dev.joinsharkey.org/static-assets/transparent.png",
    "header_static": "https://dev.joinsharkey.org/static-assets/transparent.png",
    "emojis": [],
    "moved": null,
    "fields": [],
    "bot": false,
    "discoverable": true
  },
  "in_reply_to_id": null,
  "in_reply_to_account_id": null,
  "reblog": null,
  "content": "<p><span>All fields</span></p>",
  "content_type": "text/x.misskeymarkdown",
  "text": "All fields",
  "created_at": "2023-12-15T11:07:14.000Z",
  "emojis": [],
  "replies_count": 0,
  "reblogs_count": 0,
  "favourites_count": 0,
  "reblogged": false,
  "favourited": false,
  "muted": false,
  "sensitive": false,
  "spoiler_text": "",
  "visibility": "public",
  "media_attachments": [],
  "mentions": [],
  "tags": [],
  "card": null,
  "poll": null,
  "application": null,
  "language": null,
  "pinned": false,
  "reactions": [],
  "emoji_reactions": [],
  "bookmarked": false,
  "quote": null
}

Example 2

activityakkomafirefishmastodon 4.1mastodon 4.2mitrasharkey

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture_one_actor/actor",
  "to": [
    "http://mastodon/users/hippo",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture_one_actor/actor/FbKO5gZ2d7k",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture_one_actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://mastodon/users/hippo"
    ],
    "id": null,
    "published": "2024-02-03T09:52:58Z",
    "content": "without id"
  }
}

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Example 3

activityakkomafirefishmastodon 4.1mastodon 4.2mitrasharkey

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture_one_actor/actor",
  "to": [
    "http://mastodon/users/hippo",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture_one_actor/actor/LbyfW7zToIo",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture_one_actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://mastodon/users/hippo"
    ],
    "id": "http://pasture_one_actor/actor/GZtQvY4EeGE",
    "published": null,
    "content": "without published"
  }
}

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Example 4

activityakkomafirefishmastodon 4.1mastodon 4.2mitrasharkey

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": null,
  "to": [
    "http://mastodon/users/hippo",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture_one_actor/actor/O-u5_O6J4Q8",
  "object": {
    "type": "Note",
    "attributedTo": null,
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://mastodon/users/hippo"
    ],
    "id": "http://pasture_one_actor/actor/si_2GHcHNTM",
    "published": "2024-02-03T09:53:02Z",
    "content": "without attributedTo"
  }
}

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{
  "id": "111584116674229365",
  "created_at": "2023-12-15T11:08:18.000Z",
  "in_reply_to_id": null,
  "in_reply_to_account_id": null,
  "sensitive": false,
  "spoiler_text": "",
  "visibility": "public",
  "language": null,
  "uri": "http://pasture_one_actor/actor/YkMoptDHKpI",
  "url": "http://pasture_one_actor/actor/YkMoptDHKpI",
  "replies_count": 0,
  "reblogs_count": 0,
  "favourites_count": 0,
  "edited_at": null,
  "favourited": false,
  "reblogged": false,
  "muted": false,
  "bookmarked": false,
  "content": "without attributedTo",
  "filtered": [],
  "reblog": null,
  "account": {
    "id": "111353016223646385",
    "username": "actor",
    "acct": "actor@pasture_one_actor",
    "display_name": "Test Actor",
    "locked": false,
    "bot": false,
    "discoverable": false,
    "group": false,
    "created_at": "2023-11-04T00:00:00.000Z",
    "note": "",
    "url": "http://pasture_one_actor/actor",
    "avatar": "http://mastodon41web/avatars/original/missing.png",
    "avatar_static": "http://mastodon41web/avatars/original/missing.png",
    "header": "http://mastodon41web/headers/original/missing.png",
    "header_static": "http://mastodon41web/headers/original/missing.png",
    "followers_count": 0,
    "following_count": 0,
    "statuses_count": 943,
    "last_status_at": "2023-12-15",
    "emojis": [],
    "fields": []
  },
  "media_attachments": [],
  "mentions": [],
  "tags": [],
  "emojis": [],
  "card": null,
  "poll": null
}

{
  "id": "111866936218719736",
  "created_at": "2024-02-03T09:53:02.000Z",
  "in_reply_to_id": null,
  "in_reply_to_account_id": null,
  "sensitive": false,
  "spoiler_text": "",
  "visibility": "public",
  "language": null,
  "uri": "http://pasture_one_actor/actor/si_2GHcHNTM",
  "url": "http://pasture_one_actor/actor/si_2GHcHNTM",
  "replies_count": 0,
  "reblogs_count": 0,
  "favourites_count": 0,
  "edited_at": null,
  "favourited": false,
  "reblogged": false,
  "muted": false,
  "bookmarked": false,
  "content": "without attributedTo",
  "filtered": [],
  "reblog": null,
  "account": {
    "id": "111866920163200046",
    "username": "actor",
    "acct": "actor@pasture_one_actor",
    "display_name": "Test Actor",
    "locked": false,
    "bot": false,
    "discoverable": false,
    "group": false,
    "created_at": "2024-02-03T00:00:00.000Z",
    "note": "",
    "url": "http://pasture_one_actor/actor",
    "uri": "http://pasture_one_actor/actor",
    "avatar": "http://mastodon/avatars/original/missing.png",
    "avatar_static": "http://mastodon/avatars/original/missing.png",
    "header": "http://mastodon/headers/original/missing.png",
    "header_static": "http://mastodon/headers/original/missing.png",
    "followers_count": 0,
    "following_count": 0,
    "statuses_count": 93,
    "last_status_at": "2024-02-03",
    "emojis": [],
    "fields": []
  },
  "media_attachments": [],
  "mentions": [],
  "tags": [],
  "emojis": [],
  "card": null,
  "poll": null
}

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Example 5

activityakkomafirefishmastodon 4.1mastodon 4.2mitrasharkey

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture_one_actor/actor",
  "to": [
    "http://mastodon/users/hippo",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture_one_actor/actor/YA-N7GjMUqg",
  "object": {
    "type": null,
    "attributedTo": "http://pasture_one_actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://mastodon/users/hippo"
    ],
    "id": "http://pasture_one_actor/actor/GRoBT1SZe3A",
    "published": "2024-02-03T09:53:04Z",
    "content": "without type"
  }
}

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