Public addressing

Public addressing is discussed here. The essential point here is that Public, as:Public, and https://www.w3.org/ns/activitystreams#Public are equivalent as JSON-LD and thus should be treated in the same way by Fediverse applications.

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://pyfedi.local/c/pie"
  ],
  "id": "http://pasture-one-actor/activity/daiwmFvXyvU",
  "published": "2025-09-09T12:26:18Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://pyfedi.local/c/pie"
    ],
    "id": "http://pasture-one-actor/object/HkoAQgd-uwY",
    "published": "2025-09-09T12:26:18Z",
    "content": "https://www.w3.org/ns/activitystreams#Public",
    "tag": [
      {
        "type": "Mention",
        "href": "http://pyfedi.local/c/pie"
      }
    ]
  }
}

pyfedi

{
  "id": 51,
  "user_id": 2,
  "community_id": 1,
  "title": "[Microblog] https://www",
  "deleted": false,
  "nsfw": false,
  "sticky": false,
  "published": "2025-09-09T12:26:18.796956Z",
  "ap_id": "http://pasture-one-actor/object/HkoAQgd-uwY",
  "local": false,
  "language_id": 2,
  "removed": false,
  "locked": false,
  "body": "https://www.w3.org/ns/activitystreams#Public"
}

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://pyfedi.local/c/pie",
    "as:Public"
  ],
  "id": "http://pasture-one-actor/activity/Jcf0Rbc63Ws",
  "published": "2025-09-09T12:26:19Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "as:Public",
      "http://pyfedi.local/c/pie"
    ],
    "id": "http://pasture-one-actor/object/wthBhGwgX7s",
    "published": "2025-09-09T12:26:19Z",
    "content": "as:Public",
    "tag": [
      {
        "type": "Mention",
        "href": "http://pyfedi.local/c/pie"
      }
    ]
  }
}

pyfedi

{
  "id": 52,
  "user_id": 2,
  "community_id": 1,
  "title": "(content in post body)",
  "deleted": false,
  "nsfw": false,
  "sticky": false,
  "published": "2025-09-09T12:26:19.576378Z",
  "ap_id": "http://pasture-one-actor/object/wthBhGwgX7s",
  "local": false,
  "language_id": 2,
  "removed": false,
  "locked": false,
  "body": "as:Public"
}

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": [
    "Public",
    "http://pyfedi.local/c/pie"
  ],
  "id": "http://pasture-one-actor/activity/gLqR4TqcUtM",
  "published": "2025-09-09T12:26:20Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "Public",
      "http://pyfedi.local/c/pie"
    ],
    "id": "http://pasture-one-actor/object/XtImEz_sBW8",
    "published": "2025-09-09T12:26:20Z",
    "content": "Public",
    "tag": [
      {
        "type": "Mention",
        "href": "http://pyfedi.local/c/pie"
      }
    ]
  }
}

pyfedi

{
  "id": 53,
  "user_id": 2,
  "community_id": 1,
  "title": "(content in post body)",
  "deleted": false,
  "nsfw": false,
  "sticky": false,
  "published": "2025-09-09T12:26:20.398795Z",
  "ap_id": "http://pasture-one-actor/object/XtImEz_sBW8",
  "local": false,
  "language_id": 2,
  "removed": false,
  "locked": false,
  "body": "Public"
}