UnframedViewNotificationParams

The params of an unframed view notification.

Declares the base members every view notification carries, and stays open for the event-specific fields each event type adds. The v1 schema model names no method-correlated union (the events element’s params arm is selected by its sibling method), so the per-event arms cannot be expressed here without one, and an uncorrelated union of them could reject a real page element, which a published schema must not do.

sourceRange is required here and not optional: view/page serves durable-sourced events only, and durable-sourced is defined as carrying a sourceRange — the ephemeral-sourced exemption applies to item/delta, which view/page never replays.

Fields and variants

• sessionId
• sourceRange
• viewCursor

Source

schema/msp/experimental/msp.schema.json#/types/UnframedViewNotificationParams

{
  "description": "The `params` of an unframed view notification.\n\nDeclares the base members every view notification carries, and stays\n**open** for the event-specific fields each event type adds. The v1 schema\nmodel names no method-correlated union (the `events` element's `params` arm\nis selected by its sibling `method`), so the per-event arms cannot be\nexpressed here without one, and an uncorrelated union of them could reject a\nreal page element, which a published schema must not do.\n\n`sourceRange` is required here and not optional: `view/page` serves\ndurable-sourced events only, and durable-sourced is *defined*\nas carrying a `sourceRange` — the ephemeral-sourced exemption applies\nto `item/delta`, which `view/page` never replays.",
  "properties": {
    "sessionId": {
      "description": "The owning session.",
      "type": "string"
    },
    "sourceRange": {
      "$ref": "#/$defs/SourceRange",
      "description": "The durable records this event folded from."
    },
    "viewCursor": {
      "description": "The event's opaque, strictly monotonic view cursor. It stays **inside**\n`params`, where every live notification already carries it — nothing is spliced beside `method`.",
      "type": "string"
    }
  },
  "required": [
    "sessionId",
    "sourceRange",
    "viewCursor"
  ],
  "type": "object"
}