Skip to content

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/a6g2x9ocfyaz0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/EzXoyIBz4Pg",
  "published": "2025-04-11T08:45:50Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a6g2x9ocfyaz0003"
    ],
    "id": "http://pasture-one-actor/actor/jkTPdeHKCJo",
    "published": "2025-04-11T08:45:50Z",
    "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/a6g2x9ocfyaz0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/wi-EONfzV18",
  "published": "2025-04-11T08:46:01Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a6g2x9ocfyaz0003"
    ],
    "id": "http://pasture-one-actor/actor/J6FdfPjyy_o",
    "published": "2025-04-11T08:46:01Z",
    "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/a6g2x9ocfyaz0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/g8nFnzh7kO8",
  "published": "2025-04-11T08:46:11Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a6g2x9ocfyaz0003"
    ],
    "id": "http://pasture-one-actor/actor/Gm4L7XPzGY0",
    "published": "2025-04-11T08:46:11Z",
    "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/a6g2x9ocfyaz0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/Y7V4VCcUKXk",
  "published": "2025-04-11T08:46:22Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a6g2x9ocfyaz0003"
    ],
    "id": "http://pasture-one-actor/actor/-lSrUBi1Om0",
    "published": "2025-04-11T08:46:22Z",
    "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/a6g2x9ocfyaz0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/jfyPyUTPQiI",
  "published": "2025-04-11T08:46:33Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a6g2x9ocfyaz0003"
    ],
    "id": "http://pasture-one-actor/actor/cZwuS6b-boE",
    "published": "2025-04-11T08:46:33Z",
    "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/a6g2x9ocfyaz0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/n1nLEWkt-kI",
  "published": "2025-04-11T08:46:44Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a6g2x9ocfyaz0003"
    ],
    "id": "http://pasture-one-actor/actor/1QQGnwGs1rU",
    "published": "2025-04-11T08:46:44Z",
    "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/a6g2x9ocfyaz0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/yjXMj_GetTQ",
  "published": "2025-04-11T08:46:54Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a6g2x9ocfyaz0003"
    ],
    "id": "http://pasture-one-actor/actor/DQhHJa_GrFo",
    "published": "2025-04-11T08:46:54Z",
    "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/a6g2x9ocfyaz0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/rRvcNGzr5go",
  "published": "2025-04-11T08:47:05Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a6g2x9ocfyaz0003"
    ],
    "id": "http://pasture-one-actor/actor/54E7mBP394g",
    "published": "2025-04-11T08:47:05Z",
    "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/a6g2x9ocfyaz0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/ybc6trLwEC4",
  "published": "2025-04-11T08:47:16Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a6g2x9ocfyaz0003"
    ],
    "id": "http://pasture-one-actor/actor/eOrauHxyKU8",
    "published": "2025-04-11T08:47:16Z",
    "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/a6g2x9ocfyaz0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/UsL_3YNFd-4",
  "published": "2025-04-11T08:47:27Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a6g2x9ocfyaz0003"
    ],
    "id": "http://pasture-one-actor/actor/dJjQhEK1G6g",
    "published": "2025-04-11T08:47:27Z",
    "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/a6g2x9ocfyaz0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/JKzKQ8uY4Pc",
  "published": "2025-04-11T08:47:37Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a6g2x9ocfyaz0003"
    ],
    "id": "http://pasture-one-actor/actor/XNY7NT2KNKc",
    "published": "2025-04-11T08:47:37Z",
    "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/a6g2x9ocfyaz0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/uJTCIkW1sHA",
  "published": "2025-04-11T08:47:48Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a6g2x9ocfyaz0003"
    ],
    "id": "http://pasture-one-actor/actor/M-JCVpdpftA",
    "published": "2025-04-11T08:47:48Z",
    "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/a6g2x9ocfyaz0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/zOiSSrq9Atg",
  "published": "2025-04-11T08:47:59Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a6g2x9ocfyaz0003"
    ],
    "id": "http://pasture-one-actor/actor/Zsx1b4kh7eM",
    "published": "2025-04-11T08:47:59Z",
    "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/a6g2x9ocfyaz0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/aJgMBjO6zvc",
  "published": "2025-04-11T08:48:09Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a6g2x9ocfyaz0003"
    ],
    "id": "http://pasture-one-actor/actor/aqjS97TIcqE",
    "published": "2025-04-11T08:48:09Z",
    "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/a6g2x9ocfyaz0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/f240rBOAH_I",
  "published": "2025-04-11T08:48:20Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a6g2x9ocfyaz0003"
    ],
    "id": "http://pasture-one-actor/actor/M2c-lgEZfeo",
    "published": "2025-04-11T08:48:20Z",
    "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/a6g2x9ocfyaz0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/5kHqB1MOWAA",
  "published": "2025-04-11T08:48:31Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a6g2x9ocfyaz0003"
    ],
    "id": "http://pasture-one-actor/actor/5RBA9aAWOlc",
    "published": "2025-04-11T08:48:31Z",
    "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/a6g2x9ocfyaz0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/j40PGCascNE",
  "published": "2025-04-11T08:48:42Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a6g2x9ocfyaz0003"
    ],
    "id": "http://pasture-one-actor/actor/fUDU7__r0Ps",
    "published": "2025-04-11T08:48:42Z",
    "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/a6g2x9ocfyaz0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/wdWxIssaWJ4",
  "published": "2025-04-11T08:48:52Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a6g2x9ocfyaz0003"
    ],
    "id": "http://pasture-one-actor/actor/m8RJu2cgh8Y",
    "published": "2025-04-11T08:48:52Z",
    "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/a6g2x9ocfyaz0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/jLocxIkqsJw",
  "published": "2025-04-11T08:49:03Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a6g2x9ocfyaz0003"
    ],
    "id": "http://pasture-one-actor/actor/jCWCo8PlKqA",
    "published": "2025-04-11T08:49:03Z",
    "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/a6g2x9ocfyaz0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/2B6Ue_14Pyc",
  "published": "2025-04-11T08:49:14Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a6g2x9ocfyaz0003"
    ],
    "id": "http://pasture-one-actor/actor/ToyvI9XXxv8",
    "published": "2025-04-11T08:49:14Z",
    "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/a6g2x9ocfyaz0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/SHj9RYLAYEI",
  "published": "2025-04-11T08:49:25Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a6g2x9ocfyaz0003"
    ],
    "id": "http://pasture-one-actor/actor/573rs1yB8AM",
    "published": "2025-04-11T08:49:25Z",
    "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/a6g2x9ocfyaz0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/kSduLMjJmKo",
  "published": "2025-04-11T08:49:35Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a6g2x9ocfyaz0003"
    ],
    "id": "http://pasture-one-actor/actor/3ry1kTY0lfY",
    "published": "2025-04-11T08:49:35Z",
    "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/a6g2x9ocfyaz0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/GlvJ7U3M-3k",
  "published": "2025-04-11T08:49:46Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a6g2x9ocfyaz0003"
    ],
    "id": "http://pasture-one-actor/actor/K-K3OjXNM8g",
    "published": "2025-04-11T08:49:46Z",
    "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/a6g2x9ocfyaz0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/WKxyowSVz2Y",
  "published": "2025-04-11T08:49:57Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a6g2x9ocfyaz0003"
    ],
    "id": "http://pasture-one-actor/actor/n9VH7N51Ms0",
    "published": "2025-04-11T08:49:57Z",
    "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/a6g2x9ocfyaz0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/W0vQ49ZgOWE",
  "published": "2025-04-11T08:50:08Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a6g2x9ocfyaz0003"
    ],
    "id": "http://pasture-one-actor/actor/ZjqyHLbf74Y",
    "published": "2025-04-11T08:50:08Z",
    "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/a6g2x9ocfyaz0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/wkp5uUa-oRM",
  "published": "2025-04-11T08:50:18Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a6g2x9ocfyaz0003"
    ],
    "id": "http://pasture-one-actor/actor/zVwJtFKJAZM",
    "published": "2025-04-11T08:50:18Z",
    "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/a6g2x9ocfyaz0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/kGkIASZER6k",
  "published": "2025-04-11T08:50:29Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a6g2x9ocfyaz0003"
    ],
    "id": "http://pasture-one-actor/actor/udcWje90SEg",
    "published": "2025-04-11T08:50:29Z",
    "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/a6g2x9ocfyaz0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/udwv2xqKxPE",
  "published": "2025-04-11T08:50:40Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a6g2x9ocfyaz0003"
    ],
    "id": "http://pasture-one-actor/actor/BCTXCV_Oh6I",
    "published": "2025-04-11T08:50:40Z",
    "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/a6g2x9ocfyaz0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/Rcqjsml0irM",
  "published": "2025-04-11T08:50:51Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a6g2x9ocfyaz0003"
    ],
    "id": "http://pasture-one-actor/actor/xwA1vrt2x30",
    "published": "2025-04-11T08:50:51Z",
    "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/a6g2x9ocfyaz0003",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/jbi1avlFboc",
  "published": "2025-04-11T08:51:01Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a6g2x9ocfyaz0003"
    ],
    "id": "http://pasture-one-actor/actor/8vW46hjo1Yg",
    "published": "2025-04-11T08:51:01Z",
    "summary": "Audio <audio controls src=\"http://pasture-one-actor/assets/cow_moo.mp3\"></audio>",
    "content": "See summary"
  }
}