Necessary properties for events

Example 1: without attributedTo

Activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "actor": "http://host.test/some/actor",
  "cc": [],
  "id": "http://host.test/activities/zBtrXhtPJWrtTvLt",
  "object": {
    "@context": [
      "https://www.w3.org/ns/activitystreams"
    ],
    "cc": [],
    "content": "event content",
    "endTime": "2026-04-18T10:48:43.257819+00:00Z",
    "id": "http://host.test/objects/VHivkpPP7lKc7cEJ",
    "location": {
      "type": "VirtualLocation",
      "url": "http://localhost"
    },
    "name": "my event",
    "published": "2026-04-14T07:48:43Z",
    "startTime": "2026-04-18T07:48:43.257800+00:00Z",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://other.test/some/actor"
    ],
    "type": "Event"
  },
  "published": "2026-04-14T07:48:43Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Create"
}

Object

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "cc": [],
  "content": "event content",
  "endTime": "2026-04-18T10:48:43.257819+00:00Z",
  "id": "http://host.test/objects/VHivkpPP7lKc7cEJ",
  "location": {
    "type": "VirtualLocation",
    "url": "http://localhost"
  },
  "name": "my event",
  "published": "2026-04-14T07:48:43Z",
  "startTime": "2026-04-18T07:48:43.257800+00:00Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Event"
}

Example 2: without cc

Activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "actor": "http://host.test/some/actor",
  "cc": [],
  "id": "http://host.test/activities/hUQAYJ4QZID19Txe",
  "object": {
    "@context": [
      "https://www.w3.org/ns/activitystreams"
    ],
    "attributedTo": "http://host.test/some/actor",
    "content": "event content",
    "endTime": "2026-04-18T10:48:43.257956+00:00Z",
    "id": "http://host.test/objects/NbIsAdBo6eCCEW3Z",
    "location": {
      "type": "VirtualLocation",
      "url": "http://localhost"
    },
    "name": "my event",
    "published": "2026-04-14T07:48:43Z",
    "startTime": "2026-04-18T07:48:43.257949+00:00Z",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://other.test/some/actor"
    ],
    "type": "Event"
  },
  "published": "2026-04-14T07:48:43Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Create"
}

Object

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "attributedTo": "http://host.test/some/actor",
  "content": "event content",
  "endTime": "2026-04-18T10:48:43.257956+00:00Z",
  "id": "http://host.test/objects/NbIsAdBo6eCCEW3Z",
  "location": {
    "type": "VirtualLocation",
    "url": "http://localhost"
  },
  "name": "my event",
  "published": "2026-04-14T07:48:43Z",
  "startTime": "2026-04-18T07:48:43.257949+00:00Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Event"
}

Example 3: without type

Activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "actor": "http://host.test/some/actor",
  "cc": [],
  "id": "http://host.test/activities/NDLoPXk4xfIpSFpq",
  "object": {
    "@context": [
      "https://www.w3.org/ns/activitystreams"
    ],
    "attributedTo": "http://host.test/some/actor",
    "cc": [],
    "content": "event content",
    "endTime": "2026-04-18T10:48:43.258135+00:00Z",
    "id": "http://host.test/objects/t-OgknImUFuQQAdy",
    "location": {
      "type": "VirtualLocation",
      "url": "http://localhost"
    },
    "name": "my event",
    "published": "2026-04-14T07:48:43Z",
    "startTime": "2026-04-18T07:48:43.258123+00:00Z",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://other.test/some/actor"
    ]
  },
  "published": "2026-04-14T07:48:43Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Create"
}

Object

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "attributedTo": "http://host.test/some/actor",
  "cc": [],
  "content": "event content",
  "endTime": "2026-04-18T10:48:43.258135+00:00Z",
  "id": "http://host.test/objects/t-OgknImUFuQQAdy",
  "location": {
    "type": "VirtualLocation",
    "url": "http://localhost"
  },
  "name": "my event",
  "published": "2026-04-14T07:48:43Z",
  "startTime": "2026-04-18T07:48:43.258123+00:00Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ]
}

Example 4: without published

Activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "actor": "http://host.test/some/actor",
  "cc": [],
  "id": "http://host.test/activities/tNJnzHx7OvXH7Ay9",
  "object": {
    "@context": [
      "https://www.w3.org/ns/activitystreams"
    ],
    "attributedTo": "http://host.test/some/actor",
    "cc": [],
    "content": "event content",
    "endTime": "2026-04-18T10:48:43.258403+00:00Z",
    "id": "http://host.test/objects/Axz0TrphOM-t_5Dh",
    "location": {
      "type": "VirtualLocation",
      "url": "http://localhost"
    },
    "name": "my event",
    "startTime": "2026-04-18T07:48:43.258391+00:00Z",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://other.test/some/actor"
    ],
    "type": "Event"
  },
  "published": "2026-04-14T07:48:43Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Create"
}

Object

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "attributedTo": "http://host.test/some/actor",
  "cc": [],
  "content": "event content",
  "endTime": "2026-04-18T10:48:43.258403+00:00Z",
  "id": "http://host.test/objects/Axz0TrphOM-t_5Dh",
  "location": {
    "type": "VirtualLocation",
    "url": "http://localhost"
  },
  "name": "my event",
  "startTime": "2026-04-18T07:48:43.258391+00:00Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Event"
}

Example 5: without content

Activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "actor": "http://host.test/some/actor",
  "cc": [],
  "id": "http://host.test/activities/ZtSaKYmMvGLqpLNT",
  "object": {
    "@context": [
      "https://www.w3.org/ns/activitystreams"
    ],
    "attributedTo": "http://host.test/some/actor",
    "cc": [],
    "endTime": "2026-04-18T10:48:43.258590+00:00Z",
    "id": "http://host.test/objects/HlVIpgdbjkJHJuS9",
    "location": {
      "type": "VirtualLocation",
      "url": "http://localhost"
    },
    "name": "my event",
    "published": "2026-04-14T07:48:43Z",
    "startTime": "2026-04-18T07:48:43.258583+00:00Z",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://other.test/some/actor"
    ],
    "type": "Event"
  },
  "published": "2026-04-14T07:48:43Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Create"
}

Object

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "attributedTo": "http://host.test/some/actor",
  "cc": [],
  "endTime": "2026-04-18T10:48:43.258590+00:00Z",
  "id": "http://host.test/objects/HlVIpgdbjkJHJuS9",
  "location": {
    "type": "VirtualLocation",
    "url": "http://localhost"
  },
  "name": "my event",
  "published": "2026-04-14T07:48:43Z",
  "startTime": "2026-04-18T07:48:43.258583+00:00Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Event"
}

Example 6: without endTime

Activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "actor": "http://host.test/some/actor",
  "cc": [],
  "id": "http://host.test/activities/YmcukyXVXmKwWLzc",
  "object": {
    "@context": [
      "https://www.w3.org/ns/activitystreams"
    ],
    "attributedTo": "http://host.test/some/actor",
    "cc": [],
    "content": "event content",
    "id": "http://host.test/objects/RW-zMop62bHaHmWH",
    "location": {
      "type": "VirtualLocation",
      "url": "http://localhost"
    },
    "name": "my event",
    "published": "2026-04-14T07:48:43Z",
    "startTime": "2026-04-18T07:48:43.258716+00:00Z",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://other.test/some/actor"
    ],
    "type": "Event"
  },
  "published": "2026-04-14T07:48:43Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Create"
}

Object

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "attributedTo": "http://host.test/some/actor",
  "cc": [],
  "content": "event content",
  "id": "http://host.test/objects/RW-zMop62bHaHmWH",
  "location": {
    "type": "VirtualLocation",
    "url": "http://localhost"
  },
  "name": "my event",
  "published": "2026-04-14T07:48:43Z",
  "startTime": "2026-04-18T07:48:43.258716+00:00Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Event"
}

Example 7: without location

Activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "actor": "http://host.test/some/actor",
  "cc": [],
  "id": "http://host.test/activities/rYVoumK0SAIZ904e",
  "object": {
    "@context": [
      "https://www.w3.org/ns/activitystreams"
    ],
    "attributedTo": "http://host.test/some/actor",
    "cc": [],
    "content": "event content",
    "endTime": "2026-04-18T10:48:43.258840+00:00Z",
    "id": "http://host.test/objects/w-QX47B_RHgx24Pi",
    "name": "my event",
    "published": "2026-04-14T07:48:43Z",
    "startTime": "2026-04-18T07:48:43.258834+00:00Z",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://other.test/some/actor"
    ],
    "type": "Event"
  },
  "published": "2026-04-14T07:48:43Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Create"
}

Object

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "attributedTo": "http://host.test/some/actor",
  "cc": [],
  "content": "event content",
  "endTime": "2026-04-18T10:48:43.258840+00:00Z",
  "id": "http://host.test/objects/w-QX47B_RHgx24Pi",
  "name": "my event",
  "published": "2026-04-14T07:48:43Z",
  "startTime": "2026-04-18T07:48:43.258834+00:00Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Event"
}

Example 8: without name

Activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "actor": "http://host.test/some/actor",
  "cc": [],
  "id": "http://host.test/activities/DP6vXdVuJR2qOzfs",
  "object": {
    "@context": [
      "https://www.w3.org/ns/activitystreams"
    ],
    "attributedTo": "http://host.test/some/actor",
    "cc": [],
    "content": "event content",
    "endTime": "2026-04-18T10:48:43.258953+00:00Z",
    "id": "http://host.test/objects/kIAm3wJKL2_wNB9q",
    "location": {
      "type": "VirtualLocation",
      "url": "http://localhost"
    },
    "published": "2026-04-14T07:48:43Z",
    "startTime": "2026-04-18T07:48:43.258946+00:00Z",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://other.test/some/actor"
    ],
    "type": "Event"
  },
  "published": "2026-04-14T07:48:43Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Create"
}

Object

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "attributedTo": "http://host.test/some/actor",
  "cc": [],
  "content": "event content",
  "endTime": "2026-04-18T10:48:43.258953+00:00Z",
  "id": "http://host.test/objects/kIAm3wJKL2_wNB9q",
  "location": {
    "type": "VirtualLocation",
    "url": "http://localhost"
  },
  "published": "2026-04-14T07:48:43Z",
  "startTime": "2026-04-18T07:48:43.258946+00:00Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Event"
}

Example 9: without startTime

Activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "actor": "http://host.test/some/actor",
  "cc": [],
  "id": "http://host.test/activities/DF-VFj_4B9jtKng_",
  "object": {
    "@context": [
      "https://www.w3.org/ns/activitystreams"
    ],
    "attributedTo": "http://host.test/some/actor",
    "cc": [],
    "content": "event content",
    "endTime": "2026-04-18T10:48:43.259067+00:00Z",
    "id": "http://host.test/objects/LyzhE8474ivAxiUB",
    "location": {
      "type": "VirtualLocation",
      "url": "http://localhost"
    },
    "name": "my event",
    "published": "2026-04-14T07:48:43Z",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://other.test/some/actor"
    ],
    "type": "Event"
  },
  "published": "2026-04-14T07:48:43Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Create"
}

Object

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "attributedTo": "http://host.test/some/actor",
  "cc": [],
  "content": "event content",
  "endTime": "2026-04-18T10:48:43.259067+00:00Z",
  "id": "http://host.test/objects/LyzhE8474ivAxiUB",
  "location": {
    "type": "VirtualLocation",
    "url": "http://localhost"
  },
  "name": "my event",
  "published": "2026-04-14T07:48:43Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Event"
}