[schema] Application Service Registration meta schema (#2132)

changelogs/application_service/newsfragments/2132.clarification

@@ -0,0 +1 @@
+Declare the Application Service Registration schema to follow JSON Schema spec 2020-12.

changelogs/client_server/newsfragments/2132.clarification

@@ -0,0 +1 @@
+Declare the event schemas to follow JSON Schema spec 2020-12.

data/api/application-service/definitions/namespace_list.yaml

@@ -11,6 +11,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+$schema: https://json-schema.org/draft/2020-12/schema
 
 type: array
 items:

data/api/application-service/definitions/registration.yaml

@@ -11,6 +11,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+$schema: https://json-schema.org/draft/2020-12/schema
 
 type: object
 title: Registration

data/event-schemas/moderation_policy_rule.yaml

@@ -11,6 +11,8 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+$schema: https://json-schema.org/draft/2020-12/schema
+
 properties:
   entity:
     description: |-

data/event-schemas/schema/components/sdp_stream_metadata.yaml

@@ -1,3 +1,5 @@
+$schema: https://json-schema.org/draft/2020-12/schema
+
 type: object
 x-addedInMatrixVersion: "1.10"
 description: |-

data/event-schemas/schema/core-event-schema/call_event.yaml

@@ -1,3 +1,5 @@
+$schema: https://json-schema.org/draft/2020-12/schema
+
 description: "The content of all call events shares a set of common fields: those
   of room events and some additional VoIP specific fields."
 properties:

data/event-schemas/schema/core-event-schema/event.yaml

@@ -1,3 +1,5 @@
+$schema: https://json-schema.org/draft/2020-12/schema
+
 description: The basic set of fields all events must have.
 properties:
   content:

data/event-schemas/schema/core-event-schema/msgtype_infos/avatar_info.yaml

@@ -1,3 +1,5 @@
+$schema: https://json-schema.org/draft/2020-12/schema
+
 description: Metadata about an avatar image.
 properties:
   h:

data/event-schemas/schema/core-event-schema/msgtype_infos/image_info.yaml

@@ -1,3 +1,5 @@
+$schema: https://json-schema.org/draft/2020-12/schema
+
 description: Metadata about an image.
 properties:
   h:

data/event-schemas/schema/core-event-schema/msgtype_infos/thumbnail_info.yaml

@@ -1,3 +1,5 @@
+$schema: https://json-schema.org/draft/2020-12/schema
+
 description: Metadata about a thumbnail image.
 properties:
   h:

data/event-schemas/schema/core-event-schema/room_event.yaml

@@ -1,3 +1,5 @@
+$schema: https://json-schema.org/draft/2020-12/schema
+
 title: RoomEvent
 description: Room Events have the following fields.
 allOf:

data/event-schemas/schema/core-event-schema/state_event.yaml

@@ -1,3 +1,5 @@
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
 - $ref: room_event.yaml
 - $ref: sync_state_event.yaml

data/event-schemas/schema/core-event-schema/stripped_state.yaml

@@ -18,6 +18,8 @@
 # difficult because the schema would be at two different locations, with
 # different relative pathing.
 
+$schema: https://json-schema.org/draft/2020-12/schema
+
 title: StrippedStateEvent
 type: object
 description: |-

data/event-schemas/schema/core-event-schema/sync_room_event.yaml

@@ -17,6 +17,8 @@
 # be on events, so we give it a whole event structure as a base for room_event.
 # This base doesn't declare a room_id, which instead appears in the room_event.
 
+$schema: https://json-schema.org/draft/2020-12/schema
+
 title: SyncRoomEvent
 description: In addition to the Event fields, Room Events have the following additional
   fields.

data/event-schemas/schema/core-event-schema/sync_state_event.yaml

@@ -14,6 +14,8 @@
 
 # See sync_room_event.yaml for why this file is here.
 
+$schema: https://json-schema.org/draft/2020-12/schema
+
 title: SyncStateEvent
 description: In addition to the Room Event fields, State Events have the following
   additional fields.

data/event-schemas/schema/core-event-schema/unsigned_prop.yaml

@@ -11,6 +11,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+$schema: https://json-schema.org/draft/2020-12/schema
 
 title: UnsignedData
 type: object

data/event-schemas/schema/m.accepted_terms.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/event.yaml
 description: |-

data/event-schemas/schema/m.call.answer.yaml

@@ -1,4 +1,5 @@
 {
+    "$schema": "https://json-schema.org/draft/2020-12/schema",
     "type": "object",
     "description": "This event is sent by the callee when they wish to answer the call.",
     "x-weight": 40,

data/event-schemas/schema/m.call.candidates.yaml

@@ -1,3 +1,5 @@
+$schema: https://json-schema.org/draft/2020-12/schema
+
 type: object
 description: |-
   This event is sent by callers after sending an invite and by the callee after

data/event-schemas/schema/m.call.hangup.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 type: object
 description: |
   Sent by either party to signal their termination of the call. This can

data/event-schemas/schema/m.call.invite.yaml

@@ -1,4 +1,5 @@
 {
+    "$schema": "https://json-schema.org/draft/2020-12/schema",
     "type": "object",
     "description": "This event is sent by the caller when they wish to establish a call.",
     "x-weight": 10,

data/event-schemas/schema/m.call.negotiate.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 type: object
 description: |
   Provides SDP negotiation semantics for media pause, hold/resume, ICE restarts

data/event-schemas/schema/m.call.reject.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 type: object
 description: |
   If the `m.call.invite` event has `version` `"1"`, a client wishing to

data/event-schemas/schema/m.call.sdp_stream_metadata_changed.yaml

@@ -1,3 +1,5 @@
+$schema: https://json-schema.org/draft/2020-12/schema
+
 type: object
 x-addedInMatrixVersion: "1.11"
 x-weight: 70

data/event-schemas/schema/m.call.select_answer.yaml

@@ -1,4 +1,5 @@
 {
+    "$schema": "https://json-schema.org/draft/2020-12/schema",
     "type": "object",
     "description": "This event is sent by the caller's client once it has decided which other client to talk to, by selecting one of multiple possible incoming `m.call.answer` events. Its `selected_party_id` field indicates the answer it's chosen. The `call_id` and `party_id` of the caller is also included. If the callee's client sees a `select_answer` for an answer with party ID other than the one it sent, it ends the call and informs the user the call was answered elsewhere. It does not send any events. Media can start flowing before this event is seen or even sent.  Clients that implement previous versions of this specification will ignore this event and behave as they did before.",
     "x-addedInMatrixVersion": "1.7",

data/event-schemas/schema/m.direct.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/event.yaml
 description: |-

data/event-schemas/schema/m.dummy.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/event.yaml
 

data/event-schemas/schema/m.forwarded_room_key.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/event.yaml
 

data/event-schemas/schema/m.fully_read.yaml

@@ -1,4 +1,5 @@
 {
+    "$schema": "https://json-schema.org/draft/2020-12/schema",
     "type": "object",
     "title": "Read Marker Location Event",
     "description": "The current location of the user's read marker in a room. This event appears in the user's room account data for the room the marker is applicable for.",

data/event-schemas/schema/m.identity_server.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/event.yaml
 description: |-

data/event-schemas/schema/m.ignored_user_list.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/event.yaml
 description: |-

data/event-schemas/schema/m.key.verification.accept.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/event.yaml
 

data/event-schemas/schema/m.key.verification.cancel.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/event.yaml
 

data/event-schemas/schema/m.key.verification.done.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/event.yaml
 

data/event-schemas/schema/m.key.verification.key.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/event.yaml
 

data/event-schemas/schema/m.key.verification.m.relates_to.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 description: |-
   Required when sent as an in-room message. Indicates the
   `m.key.verification.request` that this message is related to. Note that for

data/event-schemas/schema/m.key.verification.mac.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/event.yaml
 

data/event-schemas/schema/m.key.verification.ready.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/event.yaml
 

data/event-schemas/schema/m.key.verification.request.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/event.yaml
 

data/event-schemas/schema/m.key.verification.start$m.reciprocate.v1.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/event.yaml
 

data/event-schemas/schema/m.key.verification.start$m.sas.v1.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/event.yaml
 

data/event-schemas/schema/m.key.verification.start.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/event.yaml
 

data/event-schemas/schema/m.marked_unread.yaml

@@ -1,4 +1,5 @@
 {
+    "$schema": "https://json-schema.org/draft/2020-12/schema",
     "type": "object",
     "title": "Unread Marker Event",
     "description": "The current state of the user's unread marker in a room. This event appears in the user's room account data for the room the marker is applicable for.",

data/event-schemas/schema/m.policy.rule.room.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/state_event.yaml
 description: A moderation policy rule which affects room IDs and room aliases.

data/event-schemas/schema/m.policy.rule.server.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/state_event.yaml
 description: A moderation policy rule which affects servers.

data/event-schemas/schema/m.policy.rule.user.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/state_event.yaml
 description: A moderation policy rule which affects users.

data/event-schemas/schema/m.presence.yaml

@@ -1,4 +1,5 @@
 {
+    "$schema": "https://json-schema.org/draft/2020-12/schema",
     "type": "object",
     "title": "Presence Event",
     "description": "Informs the client of a user's presence state change.",

data/event-schemas/schema/m.push_rules.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/event.yaml
 description: Describes all push rules for this user.

data/event-schemas/schema/m.reaction.yaml

@@ -1,3 +1,5 @@
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/room_event.yaml
 description: |-

data/event-schemas/schema/m.receipt.yaml

@@ -1,3 +1,5 @@
+$schema: https://json-schema.org/draft/2020-12/schema
+
 type: object
 title: Receipt Event
 description: Informs the client of new receipts.

data/event-schemas/schema/m.room.avatar.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/state_event.yaml
 description: A picture that is associated with the room. This can be displayed alongside the room information.

data/event-schemas/schema/m.room.canonical_alias.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/state_event.yaml
 description: |-

data/event-schemas/schema/m.room.create.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/state_event.yaml
 description: This is the first event in a room and cannot be changed. It acts as the root of all other events.

data/event-schemas/schema/m.room.encrypted.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/event.yaml
 

data/event-schemas/schema/m.room.encryption.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/state_event.yaml
 description: Defines how messages sent in this room should be encrypted.

data/event-schemas/schema/m.room.guest_access.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/state_event.yaml
 description: 'This event controls whether guest users are allowed to join rooms. If this event is absent, servers should act as if it is present and has the guest_access value "forbidden".'

data/event-schemas/schema/m.room.history_visibility.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/state_event.yaml
 description: This event controls whether a user can see the events that happened in a room from before they joined.

data/event-schemas/schema/m.room.join_rules.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/state_event.yaml
 description: |

data/event-schemas/schema/m.room.member.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/state_event.yaml
 description: |-

data/event-schemas/schema/m.room.message$m.audio.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/room_event.yaml
 description: This message represents a single audio clip.

data/event-schemas/schema/m.room.message$m.emote.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/room_event.yaml
 description: "This message is similar to `m.text` except that the sender is 'performing' the action contained in the `body` key, similar to `/me` in IRC. This message should be prefixed by the name of the sender. This message could also be represented in a different colour to distinguish it from regular `m.text` messages."

data/event-schemas/schema/m.room.message$m.file.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/room_event.yaml
 description: This message represents a generic file.

data/event-schemas/schema/m.room.message$m.image.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/room_event.yaml
 description: This message represents a single image and an optional thumbnail.

data/event-schemas/schema/m.room.message$m.key.verification.request.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/room_event.yaml
 description:

data/event-schemas/schema/m.room.message$m.location.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/room_event.yaml
 description: This message represents a real-world location.

data/event-schemas/schema/m.room.message$m.notice.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/room_event.yaml
 description: 'The `m.notice` type is primarily intended for responses from automated clients. An `m.notice` message must be treated the same way as a regular `m.text` message with two exceptions. Firstly, clients should present `m.notice` messages to users in a distinct manner, and secondly, `m.notice` messages must never be automatically responded to. This helps to prevent infinite-loop situations where two automated clients continuously exchange messages.'

data/event-schemas/schema/m.room.message$m.server_notice.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/room_event.yaml
 description: Represents a server notice for a user.

data/event-schemas/schema/m.room.message$m.text.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/room_event.yaml
 description: This message is the most basic message and is used to represent text.

data/event-schemas/schema/m.room.message$m.video.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/room_event.yaml
 description: This message represents a single video clip.

data/event-schemas/schema/m.room.message.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/room_event.yaml
 description: 'This event is used when sending messages in a room. Messages are not limited to be text. The `msgtype` key outlines the type of message, e.g. text, audio, image, video, etc. The `body` key is text and MUST be used with every kind of `msgtype` as a fallback mechanism for when a client cannot render a message. This allows clients to display *something* even if it is just plain text.'

data/event-schemas/schema/m.room.name.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/state_event.yaml
 description: |-

data/event-schemas/schema/m.room.pinned_events.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/state_event.yaml
 description: This event is used to "pin" particular events in a room for other participants to review later. The order of the pinned events is guaranteed and based upon the order supplied in the event. Clients should be aware that the current user may not be able to see some of the events pinned due to visibility settings in the room. Clients are responsible for determining if a particular event in the pinned list is displayable, and have the option to not display it if it cannot be pinned in the client.

data/event-schemas/schema/m.room.power_levels.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/state_event.yaml
 description: |-

data/event-schemas/schema/m.room.redaction.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/room_event.yaml
 description: 'This event is created by the server to describe which event has been redacted, by whom, and optionally why. The event that has been redacted is specified in the `redacts` event level key. Redacting an event means that all keys not required by the protocol are stripped off, allowing messages to be hidden or allowing admins to remove offensive or illegal content.'

data/event-schemas/schema/m.room.server_acl.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 title: Server ACL
 description: |-
   An event to indicate which servers are permitted to participate in the

data/event-schemas/schema/m.room.third_party_invite.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/state_event.yaml
 description: |-

data/event-schemas/schema/m.room.tombstone.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/state_event.yaml
 description: 'A state event signifying that a room has been upgraded to a different room version, and that clients should go there.'

data/event-schemas/schema/m.room.topic.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/state_event.yaml
 description: |-

data/event-schemas/schema/m.room_key.withheld.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/event.yaml
 

data/event-schemas/schema/m.room_key.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/event.yaml
 

data/event-schemas/schema/m.room_key_request.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/event.yaml
 

data/event-schemas/schema/m.secret.request.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/event.yaml
 description: |-

data/event-schemas/schema/m.secret.send.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/event.yaml
 description: |-

data/event-schemas/schema/m.space.child.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/state_event.yaml
 description: Defines the relationship of a child room to a space-room. Has no effect in rooms which are not [spaces](/client-server-api/#spaces).

data/event-schemas/schema/m.space.parent.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/state_event.yaml
 description: Defines the relationship of a room to a parent space-room.

data/event-schemas/schema/m.sticker.yaml

@@ -1,4 +1,6 @@
 ---
+$schema: https://json-schema.org/draft/2020-12/schema
+
 allOf:
   - $ref: core-event-schema/room_event.yaml
 description: This message represents a single sticker image.

data/event-schemas/schema/m.tag.yaml

@@ -1,4 +1,5 @@
 {
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
   "type": "object",
   "title": "Tag Event",
   "description": "Informs the client of tags on a room.",

data/event-schemas/schema/m.typing.yaml

@@ -1,4 +1,5 @@
 {
+    "$schema": "https://json-schema.org/draft/2020-12/schema",
     "type": "object",
     "title": "Typing Event",
     "description": "Informs the client of the list of users currently typing.",