{ "$schema": "http://json-schema.org/draft-04/schema#", "type": "object", "title": "Topic", "description": "A topic is a short message detailing what is currently being discussed in the room. It can also be used as a way to display extra information about the room, which may not be suitable for the room name. The room topic can also be set when creating a room using ``/createRoom`` with the ``topic`` key.", "allOf": [{ "$ref": "core/state_event.json" }], "properties": { "content": { "type": "object", "properties": { "topic": { "type": "string", "description": "The topic text." } }, "required": ["topic"] }, "state_key": { "type": "string", "description": "A zero-length string.", "pattern": "^$" }, "type": { "type": "string", "enum": ["m.room.topic"] } } }