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/a8jupxivzylk0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/ez8AO0BBdrw",
  "published": "2025-06-03T09:26:41Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a8jupxivzylk0003"
    ],
    "id": "http://pasture-one-actor/actor/8P_nFLD5imQ",
    "published": "2025-06-03T09:26:41Z",
    "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/a8jupxivzylk0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/WPWOH-otaDY",
  "published": "2025-06-03T09:26:52Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a8jupxivzylk0003"
    ],
    "id": "http://pasture-one-actor/actor/QhOKOwQq6ls",
    "published": "2025-06-03T09:26:52Z",
    "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/a8jupxivzylk0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/maF5XevL0GA",
  "published": "2025-06-03T09:27:02Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a8jupxivzylk0003"
    ],
    "id": "http://pasture-one-actor/actor/IOlGdselJ-k",
    "published": "2025-06-03T09:27:02Z",
    "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/a8jupxivzylk0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/IlKZIzyFolw",
  "published": "2025-06-03T09:27:13Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a8jupxivzylk0003"
    ],
    "id": "http://pasture-one-actor/actor/mw_8Gn__Aws",
    "published": "2025-06-03T09:27:13Z",
    "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/a8jupxivzylk0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/sJhepmMRdDc",
  "published": "2025-06-03T09:27:24Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a8jupxivzylk0003"
    ],
    "id": "http://pasture-one-actor/actor/8FDrVtzCgUo",
    "published": "2025-06-03T09:27:24Z",
    "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/a8jupxivzylk0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/vGTspouqimo",
  "published": "2025-06-03T09:27:35Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a8jupxivzylk0003"
    ],
    "id": "http://pasture-one-actor/actor/0yTU59Wi8A8",
    "published": "2025-06-03T09:27:35Z",
    "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/a8jupxivzylk0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/ciGoJ4z8ywQ",
  "published": "2025-06-03T09:27:45Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a8jupxivzylk0003"
    ],
    "id": "http://pasture-one-actor/actor/3IBMsqit-0E",
    "published": "2025-06-03T09:27:45Z",
    "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/a8jupxivzylk0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/TC_lk8GIBFs",
  "published": "2025-06-03T09:27:56Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a8jupxivzylk0003"
    ],
    "id": "http://pasture-one-actor/actor/9hZ8YWNO-VA",
    "published": "2025-06-03T09:27:56Z",
    "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/a8jupxivzylk0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/l5Zw9WWbbAc",
  "published": "2025-06-03T09:28:07Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a8jupxivzylk0003"
    ],
    "id": "http://pasture-one-actor/actor/mnCD5D3UXEA",
    "published": "2025-06-03T09:28:07Z",
    "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/a8jupxivzylk0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/xyQyegO_Mjk",
  "published": "2025-06-03T09:28:18Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a8jupxivzylk0003"
    ],
    "id": "http://pasture-one-actor/actor/IEdiVq49Ba0",
    "published": "2025-06-03T09:28:18Z",
    "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/a8jupxivzylk0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/XOZTeFjD2vM",
  "published": "2025-06-03T09:28:28Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a8jupxivzylk0003"
    ],
    "id": "http://pasture-one-actor/actor/HfHrnx5eYTk",
    "published": "2025-06-03T09:28:28Z",
    "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/a8jupxivzylk0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/5ER7rSxHPME",
  "published": "2025-06-03T09:28:39Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a8jupxivzylk0003"
    ],
    "id": "http://pasture-one-actor/actor/c3j8-VtjNig",
    "published": "2025-06-03T09:28:39Z",
    "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/a8jupxivzylk0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/vQmOhXxdOn8",
  "published": "2025-06-03T09:28:50Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a8jupxivzylk0003"
    ],
    "id": "http://pasture-one-actor/actor/TceIlpiI3L8",
    "published": "2025-06-03T09:28:50Z",
    "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/a8jupxivzylk0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/6KqwZqKOdVY",
  "published": "2025-06-03T09:29:01Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a8jupxivzylk0003"
    ],
    "id": "http://pasture-one-actor/actor/jLfnf55GjaY",
    "published": "2025-06-03T09:29:01Z",
    "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/a8jupxivzylk0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/pincQWPm_X8",
  "published": "2025-06-03T09:29:11Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a8jupxivzylk0003"
    ],
    "id": "http://pasture-one-actor/actor/yadC72a4UqU",
    "published": "2025-06-03T09:29:11Z",
    "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/a8jupxivzylk0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/EbmkBV3HIHw",
  "published": "2025-06-03T09:29:22Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a8jupxivzylk0003"
    ],
    "id": "http://pasture-one-actor/actor/cJ3JToP_QV4",
    "published": "2025-06-03T09:29:22Z",
    "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/a8jupxivzylk0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/KjR0vlnZF2Y",
  "published": "2025-06-03T09:29:33Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a8jupxivzylk0003"
    ],
    "id": "http://pasture-one-actor/actor/00XYc6RlPAQ",
    "published": "2025-06-03T09:29:33Z",
    "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/a8jupxivzylk0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/LZi4SziiUyo",
  "published": "2025-06-03T09:29:44Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a8jupxivzylk0003"
    ],
    "id": "http://pasture-one-actor/actor/cVEzBmLUR3Q",
    "published": "2025-06-03T09:29:44Z",
    "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/a8jupxivzylk0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/a2mcHXVvtpk",
  "published": "2025-06-03T09:29:54Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a8jupxivzylk0003"
    ],
    "id": "http://pasture-one-actor/actor/FYs2ox5kbXw",
    "published": "2025-06-03T09:29:54Z",
    "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/a8jupxivzylk0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/DuSNh_t7Dl8",
  "published": "2025-06-03T09:30:05Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a8jupxivzylk0003"
    ],
    "id": "http://pasture-one-actor/actor/WFY5-FcuHbQ",
    "published": "2025-06-03T09:30:05Z",
    "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/a8jupxivzylk0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/uw8Njow8MJQ",
  "published": "2025-06-03T09:30:16Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a8jupxivzylk0003"
    ],
    "id": "http://pasture-one-actor/actor/IDjuPKcb_F8",
    "published": "2025-06-03T09:30:16Z",
    "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/a8jupxivzylk0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/Fp6R1d_vY_s",
  "published": "2025-06-03T09:30:27Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a8jupxivzylk0003"
    ],
    "id": "http://pasture-one-actor/actor/DDtUVaVYUko",
    "published": "2025-06-03T09:30:27Z",
    "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/a8jupxivzylk0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/AD5_iyNVefk",
  "published": "2025-06-03T09:30:37Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a8jupxivzylk0003"
    ],
    "id": "http://pasture-one-actor/actor/5DhpL-QpBH0",
    "published": "2025-06-03T09:30:37Z",
    "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/a8jupxivzylk0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/1QhoqvQdZYI",
  "published": "2025-06-03T09:30:48Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a8jupxivzylk0003"
    ],
    "id": "http://pasture-one-actor/actor/kRR_bhW4Nrc",
    "published": "2025-06-03T09:30:48Z",
    "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/a8jupxivzylk0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/XqdQaPyM-eQ",
  "published": "2025-06-03T09:30:59Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a8jupxivzylk0003"
    ],
    "id": "http://pasture-one-actor/actor/5UXgwOLg2QM",
    "published": "2025-06-03T09:30:59Z",
    "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/a8jupxivzylk0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/0qZzCFQLzHI",
  "published": "2025-06-03T09:31:10Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a8jupxivzylk0003"
    ],
    "id": "http://pasture-one-actor/actor/kBjMk2-j-fg",
    "published": "2025-06-03T09:31:10Z",
    "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/a8jupxivzylk0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/ANA1u296gs8",
  "published": "2025-06-03T09:31:20Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a8jupxivzylk0003"
    ],
    "id": "http://pasture-one-actor/actor/lnmKlHLKqtg",
    "published": "2025-06-03T09:31:20Z",
    "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/a8jupxivzylk0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/2HQQ4WJtB5w",
  "published": "2025-06-03T09:31:31Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a8jupxivzylk0003"
    ],
    "id": "http://pasture-one-actor/actor/drHXzl9qNNU",
    "published": "2025-06-03T09:31:31Z",
    "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/a8jupxivzylk0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/0ix0bnwTvwk",
  "published": "2025-06-03T09:31:42Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a8jupxivzylk0003"
    ],
    "id": "http://pasture-one-actor/actor/J-9ei9w-Lx0",
    "published": "2025-06-03T09:31:42Z",
    "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/a8jupxivzylk0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/r6wy69w0gvc",
  "published": "2025-06-03T09:31:53Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a8jupxivzylk0003"
    ],
    "id": "http://pasture-one-actor/actor/iqf4iZMQESc",
    "published": "2025-06-03T09:31:53Z",
    "summary": "Audio <audio controls src=\"http://pasture-one-actor/assets/cow_moo.mp3\"></audio>",
    "content": "See summary"
  }
}