HTML tags in summary

Here we analyze, which types of HTML tags are allowed inside the summary field.

As the content field, the [summary field(https://www.w3.org/TR/activitystreams-vocabulary/#dfn-summary) is described as

A natural language summarization of the object encoded as HTML.

This is a somewhat petulant table as most Fediverse applications treat the summary field as a plain text content warning.

Sanitizing fields is desired behavior as seen in Section B.10 of ActivityPub.

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/a81brpe9rktl0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/hWjyIJNTMdw",
  "published": "2025-05-21T10:16:19Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a81brpe9rktl0003"
    ],
    "id": "http://pasture-one-actor/actor/if4z6b1tQS8",
    "published": "2025-05-21T10:16:19Z",
    "summary": "<b>bold</b>",
    "content": "See summary"
  }
}

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/a81brpe9rktl0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/1KBt1yf_ANk",
  "published": "2025-05-21T10:16:30Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a81brpe9rktl0003"
    ],
    "id": "http://pasture-one-actor/actor/M3vdpGOd2Yg",
    "published": "2025-05-21T10:16:30Z",
    "summary": "<strong>strong</strong>",
    "content": "See summary"
  }
}

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/a81brpe9rktl0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/C81rGYLBhfU",
  "published": "2025-05-21T10:16:41Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a81brpe9rktl0003"
    ],
    "id": "http://pasture-one-actor/actor/XHuIPzPjzAc",
    "published": "2025-05-21T10:16:41Z",
    "summary": "<i>italic</i>",
    "content": "See summary"
  }
}

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/a81brpe9rktl0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/Eg9yLAoHuxU",
  "published": "2025-05-21T10:16:52Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a81brpe9rktl0003"
    ],
    "id": "http://pasture-one-actor/actor/5qwieNxBgU4",
    "published": "2025-05-21T10:16:52Z",
    "summary": "<i>italic with.</i> See <a href=\"https://codeberg.org/helge/funfedidev/issues/142\">Issue 142</a>",
    "content": "See summary"
  }
}

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/a81brpe9rktl0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/sjzaiEIQf4g",
  "published": "2025-05-21T10:17:02Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a81brpe9rktl0003"
    ],
    "id": "http://pasture-one-actor/actor/RnRMfQzt9kU",
    "published": "2025-05-21T10:17:02Z",
    "summary": "<em>emphasis</em>",
    "content": "See summary"
  }
}

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/a81brpe9rktl0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/jTMtRdh55t4",
  "published": "2025-05-21T10:17:13Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a81brpe9rktl0003"
    ],
    "id": "http://pasture-one-actor/actor/uayHTPj1g4w",
    "published": "2025-05-21T10:17:13Z",
    "summary": "<del>old</del><ins>new</ins>",
    "content": "See summary"
  }
}

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/a81brpe9rktl0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/m9YC1iSXPP8",
  "published": "2025-05-21T10:17:24Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a81brpe9rktl0003"
    ],
    "id": "http://pasture-one-actor/actor/mDi6koddMZY",
    "published": "2025-05-21T10:17:24Z",
    "summary": "<s>stricken</s>",
    "content": "See summary"
  }
}

Example 8

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/a81brpe9rktl0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/2hKVbdnNIvk",
  "published": "2025-05-21T10:17:34Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a81brpe9rktl0003"
    ],
    "id": "http://pasture-one-actor/actor/wyGRxIA6uLs",
    "published": "2025-05-21T10:17:34Z",
    "summary": "<mark>mark</mark>",
    "content": "See summary"
  }
}

Example 9

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/a81brpe9rktl0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/DQUK7QDCYpM",
  "published": "2025-05-21T10:17:45Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a81brpe9rktl0003"
    ],
    "id": "http://pasture-one-actor/actor/binM35le9eU",
    "published": "2025-05-21T10:17:45Z",
    "summary": "find <var>x</var> (a variable)",
    "content": "See summary"
  }
}

Example 10

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/a81brpe9rktl0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/Y9U9NHJoOcg",
  "published": "2025-05-21T10:17:56Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a81brpe9rktl0003"
    ],
    "id": "http://pasture-one-actor/actor/xbPtU80vx80",
    "published": "2025-05-21T10:17:56Z",
    "summary": "<ol><li>ordered</li></ol>",
    "content": "See summary"
  }
}

Example 11

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/a81brpe9rktl0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/AV2uYQKP3WU",
  "published": "2025-05-21T10:18:07Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a81brpe9rktl0003"
    ],
    "id": "http://pasture-one-actor/actor/8FEaHbQ0OZA",
    "published": "2025-05-21T10:18:07Z",
    "summary": "<ul><li>unordered</li></ul>",
    "content": "See summary"
  }
}

Example 12

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/a81brpe9rktl0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/sSuDHdbDd-Q",
  "published": "2025-05-21T10:18:17Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a81brpe9rktl0003"
    ],
    "id": "http://pasture-one-actor/actor/znhGz29aZJU",
    "published": "2025-05-21T10:18:17Z",
    "summary": "<h1>h1</h1>",
    "content": "See summary"
  }
}

Example 13

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/a81brpe9rktl0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/gt5rv0y8JZY",
  "published": "2025-05-21T10:18:28Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a81brpe9rktl0003"
    ],
    "id": "http://pasture-one-actor/actor/E3wKK2AspL0",
    "published": "2025-05-21T10:18:28Z",
    "summary": "<h2>h2</h2>",
    "content": "See summary"
  }
}

Example 14

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/a81brpe9rktl0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/qkZm54_vJ-A",
  "published": "2025-05-21T10:18:39Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a81brpe9rktl0003"
    ],
    "id": "http://pasture-one-actor/actor/047Ch0ulido",
    "published": "2025-05-21T10:18:39Z",
    "summary": "<h3>h3</h3>",
    "content": "See summary"
  }
}

Example 15

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/a81brpe9rktl0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/rguz9Y9Yp0I",
  "published": "2025-05-21T10:18:50Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a81brpe9rktl0003"
    ],
    "id": "http://pasture-one-actor/actor/Fry74SuQQ8U",
    "published": "2025-05-21T10:18:50Z",
    "summary": "<h4>h4</h4>",
    "content": "See summary"
  }
}

Example 16

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/a81brpe9rktl0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/3imIlhfKcrk",
  "published": "2025-05-21T10:19:00Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a81brpe9rktl0003"
    ],
    "id": "http://pasture-one-actor/actor/pvkvJMGgrxA",
    "published": "2025-05-21T10:19:00Z",
    "summary": "<h5>h5</h5>",
    "content": "See summary"
  }
}

Example 17

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/a81brpe9rktl0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/cvwxArcnkdU",
  "published": "2025-05-21T10:19:11Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a81brpe9rktl0003"
    ],
    "id": "http://pasture-one-actor/actor/Ej-jpi_EJrY",
    "published": "2025-05-21T10:19:11Z",
    "summary": "<h1>h1</h1><h2>h2</h2>",
    "content": "See summary"
  }
}

Example 18

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/a81brpe9rktl0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/cVw-jXGMgU8",
  "published": "2025-05-21T10:19:22Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a81brpe9rktl0003"
    ],
    "id": "http://pasture-one-actor/actor/T1t4EPdicOo",
    "published": "2025-05-21T10:19:22Z",
    "summary": "<code>code</code>",
    "content": "See summary"
  }
}

Example 19

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/a81brpe9rktl0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/uAcRIpkGevA",
  "published": "2025-05-21T10:19:33Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a81brpe9rktl0003"
    ],
    "id": "http://pasture-one-actor/actor/lOUbyFPVNkk",
    "published": "2025-05-21T10:19:33Z",
    "summary": "<pre>pre</pre>",
    "content": "See summary"
  }
}

Example 20

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/a81brpe9rktl0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/xNnkoOGQ9uw",
  "published": "2025-05-21T10:19:43Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a81brpe9rktl0003"
    ],
    "id": "http://pasture-one-actor/actor/-2MFd0jsFBk",
    "published": "2025-05-21T10:19:43Z",
    "summary": "<blockquote>blockquote</blockquote>",
    "content": "See summary"
  }
}

Example 21

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/a81brpe9rktl0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/l6YnvhUEaHQ",
  "published": "2025-05-21T10:19:54Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a81brpe9rktl0003"
    ],
    "id": "http://pasture-one-actor/actor/kArIFh8MHKg",
    "published": "2025-05-21T10:19:54Z",
    "summary": "line<br/>break",
    "content": "See summary"
  }
}

Example 22

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/a81brpe9rktl0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/eMBsAM0ZwoI",
  "published": "2025-05-21T10:20:05Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a81brpe9rktl0003"
    ],
    "id": "http://pasture-one-actor/actor/fa_fcIiaXco",
    "published": "2025-05-21T10:20:05Z",
    "summary": "<p>paragraph</p>",
    "content": "See summary"
  }
}

Example 23

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/a81brpe9rktl0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/4hWIWPvfVZA",
  "published": "2025-05-21T10:20:16Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a81brpe9rktl0003"
    ],
    "id": "http://pasture-one-actor/actor/Rr1UtevIfwg",
    "published": "2025-05-21T10:20:16Z",
    "summary": "<small>small</small>",
    "content": "See summary"
  }
}

Example 24

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/a81brpe9rktl0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/tGVjeSMtYq0",
  "published": "2025-05-21T10:20:26Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a81brpe9rktl0003"
    ],
    "id": "http://pasture-one-actor/actor/r5c8W502XfM",
    "published": "2025-05-21T10:20:26Z",
    "summary": "<sup>sup</sup>",
    "content": "See summary"
  }
}

Example 25

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/a81brpe9rktl0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/KjowWBt3_ko",
  "published": "2025-05-21T10:20:37Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a81brpe9rktl0003"
    ],
    "id": "http://pasture-one-actor/actor/ldAREl07Iak",
    "published": "2025-05-21T10:20:37Z",
    "summary": "<sub>sub</sub>",
    "content": "See summary"
  }
}

Example 26

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/a81brpe9rktl0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/M1OoUAGLI-E",
  "published": "2025-05-21T10:20:48Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a81brpe9rktl0003"
    ],
    "id": "http://pasture-one-actor/actor/UomYKg_BZwo",
    "published": "2025-05-21T10:20:48Z",
    "summary": "<a href='https://funfedi.dev'>funfedi</a>",
    "content": "See summary"
  }
}

Example 27

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/a81brpe9rktl0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/WYeHPwmCHUE",
  "published": "2025-05-21T10:20:59Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a81brpe9rktl0003"
    ],
    "id": "http://pasture-one-actor/actor/g6Bxd9BGs5g",
    "published": "2025-05-21T10:20:59Z",
    "summary": "<script>alert('hi');</script>",
    "content": "See summary"
  }
}

Example 28

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/a81brpe9rktl0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/J_jA6NIk56w",
  "published": "2025-05-21T10:21:09Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a81brpe9rktl0003"
    ],
    "id": "http://pasture-one-actor/actor/7SNdlQyxHTU",
    "published": "2025-05-21T10:21:09Z",
    "summary": "<img src=\"http://pasture-one-actor/assets/nlnet.png\" alt=\"NLNET Logo\" />",
    "content": "See summary"
  }
}

Example 29

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/a81brpe9rktl0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/Es8ZtXmtskU",
  "published": "2025-05-21T10:21:20Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a81brpe9rktl0003"
    ],
    "id": "http://pasture-one-actor/actor/INdbAweiyCc",
    "published": "2025-05-21T10:21:20Z",
    "summary": "wbr: Fernstra\u00dfen<wbr />bau<wbr />privat<wbr />finanzierungs<wbr />gesetz",
    "content": "See summary"
  }
}

Example 30

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/a81brpe9rktl0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/xCixvGcL-wM",
  "published": "2025-05-21T10:21:31Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a81brpe9rktl0003"
    ],
    "id": "http://pasture-one-actor/actor/sn-pBwwLRjw",
    "published": "2025-05-21T10:21:31Z",
    "summary": "Audio <audio controls src=\"http://pasture-one-actor/assets/cow_moo.mp3\"></audio>",
    "content": "See summary"
  }
}