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Hashtags

The following mostly illustrates how the name of a hashtag gets transformed by the applications. The input has the form

"tag": {"type": "Hashtag", "name": "${tag}"}

The last two examples illustrate more technical behavior.

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://mbin/u/oscar",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/ndxS5aXJM8I",
  "published": "2025-07-31T11:38:30Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://mbin/u/oscar"
    ],
    "id": "http://pasture-one-actor/actor/QPYWTjdHKuA",
    "published": "2025-07-31T11:38:30Z",
    "content": "text",
    "tag": {
      "type": "Hashtag",
      "name": "#test"
    },
    "cc": []
  }
}

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://mbin/u/oscar",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/kH5P1GXZoCM",
  "published": "2025-07-31T11:38:43Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://mbin/u/oscar"
    ],
    "id": "http://pasture-one-actor/actor/uome0b5cmzE",
    "published": "2025-07-31T11:38:43Z",
    "content": "text",
    "tag": {
      "type": "Hashtag",
      "name": "nohash"
    },
    "cc": []
  }
}

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://mbin/u/oscar",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/W2zvJZ_QghQ",
  "published": "2025-07-31T11:38:56Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://mbin/u/oscar"
    ],
    "id": "http://pasture-one-actor/actor/9y9cOoTQ7kU",
    "published": "2025-07-31T11:38:56Z",
    "content": "text",
    "tag": {
      "type": "Hashtag",
      "name": "#with-dash_under"
    },
    "cc": []
  }
}

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://mbin/u/oscar",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/wLMmCnyy_-k",
  "published": "2025-07-31T11:39:09Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://mbin/u/oscar"
    ],
    "id": "http://pasture-one-actor/actor/K79vCefM0kA",
    "published": "2025-07-31T11:39:09Z",
    "content": "text",
    "tag": {
      "type": "Hashtag",
      "name": "#with white space"
    },
    "cc": []
  }
}

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://mbin/u/oscar",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/ITITNivslAs",
  "published": "2025-07-31T11:39:23Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://mbin/u/oscar"
    ],
    "id": "http://pasture-one-actor/actor/OlJXLMgP00g",
    "published": "2025-07-31T11:39:23Z",
    "content": "text",
    "tag": {
      "type": "Hashtag",
      "name": "#with(subtag)"
    },
    "cc": []
  }
}

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://mbin/u/oscar",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/Z4Yy6UmmU24",
  "published": "2025-07-31T11:39:36Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://mbin/u/oscar"
    ],
    "id": "http://pasture-one-actor/actor/65DBb1F9Bp8",
    "published": "2025-07-31T11:39:36Z",
    "content": "text",
    "tag": {
      "type": "Hashtag",
      "name": "#with123"
    },
    "cc": []
  }
}

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://mbin/u/oscar",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/ZpWL4xZcZME",
  "published": "2025-07-31T11:39:49Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://mbin/u/oscar"
    ],
    "id": "http://pasture-one-actor/actor/hz1KPSW1-eA",
    "published": "2025-07-31T11:39:49Z",
    "content": "text",
    "tag": {
      "type": "Hashtag",
      "name": "#1234"
    },
    "cc": []
  }
}

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://mbin/u/oscar",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/NocakrOmLIc",
  "published": "2025-07-31T11:40:02Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://mbin/u/oscar"
    ],
    "id": "http://pasture-one-actor/actor/PWPWsDLlDr0",
    "published": "2025-07-31T11:40:02Z",
    "content": "text",
    "tag": {
      "type": "Hashtag",
      "name": "#CamelCase"
    },
    "cc": []
  }
}

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://mbin/u/oscar",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/b8XOmv311nc",
  "published": "2025-07-31T11:40:16Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://mbin/u/oscar"
    ],
    "id": "http://pasture-one-actor/actor/9vLM1YCpTrI",
    "published": "2025-07-31T11:40:16Z",
    "content": "text",
    "tag": {
      "type": "Hashtag",
      "name": "#\u00fcml\u00e4\u00fct\u00df"
    },
    "cc": []
  }
}

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://mbin/u/oscar",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/b4dlsiLPVVM",
  "published": "2025-07-31T11:40:29Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://mbin/u/oscar"
    ],
    "id": "http://pasture-one-actor/actor/xpsoWoAnj_0",
    "published": "2025-07-31T11:40:29Z",
    "content": "text",
    "tag": {
      "type": "Hashtag",
      "name": "#\ud83d\udc04"
    },
    "cc": []
  }
}

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://mbin/u/oscar",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/I7FgM3eInO8",
  "published": "2025-07-31T11:40:42Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://mbin/u/oscar"
    ],
    "id": "http://pasture-one-actor/actor/pElh9rvPW0I",
    "published": "2025-07-31T11:40:42Z",
    "content": "text",
    "tag": {
      "type": "Hashtag",
      "name": "#\u2764\ufe0f"
    },
    "cc": []
  }
}

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://mbin/u/oscar",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/cgYb6GT9Y78",
  "published": "2025-07-31T11:40:55Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://mbin/u/oscar"
    ],
    "id": "http://pasture-one-actor/actor/-Km1NzmCFR8",
    "published": "2025-07-31T11:40:55Z",
    "content": "text",
    "tag": {
      "type": "Hashtag",
      "name": "#\u725b"
    },
    "cc": []
  }
}

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://mbin/u/oscar",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/VrXh7zj1EI0",
  "published": "2025-07-31T11:41:09Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://mbin/u/oscar"
    ],
    "id": "http://pasture-one-actor/actor/aQgPssAnH6s",
    "published": "2025-07-31T11:41:09Z",
    "content": "text",
    "tag": {
      "type": "Hashtag",
      "name": "#test",
      "url": "https://ignore.example"
    },
    "cc": []
  }
}

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://mbin/u/oscar",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/3SLfKylxipo",
  "published": "2025-07-31T11:41:22Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://mbin/u/oscar"
    ],
    "id": "http://pasture-one-actor/actor/AOFG7-ehMWw",
    "published": "2025-07-31T11:41:22Z",
    "content": "text",
    "tag": {
      "type": "as:Hashtag",
      "name": "#test"
    },
    "cc": []
  }
}

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://mbin/u/oscar",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/tUDAQansNUY",
  "published": "2025-07-31T11:41:35Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://mbin/u/oscar"
    ],
    "id": "http://pasture-one-actor/actor/4gPjbAVyLdI",
    "published": "2025-07-31T11:41:35Z",
    "content": "text",
    "tag": {
      "name": "#test"
    },
    "cc": []
  }
}