Sanity Document Structure

{
  "title": "Sanity Document Structure",
  "description": "Structure documentation for Sanity Content Lake documents",
  "type": "object",
  "fields": [
    {
      "name": "_id",
      "type": "string",
      "description": "Unique document identifier. Draft documents are prefixed with 'drafts.'",
      "required": true,
      "example": "abc123def456"
    },
    {
      "name": "_type",
      "type": "string",
      "description": "Schema type identifier mapping to a Sanity schema definition",
      "required": true,
      "example": "post"
    },
    {
      "name": "_rev",
      "type": "string",
      "description": "Revision ID, updated with each mutation for optimistic concurrency",
      "required": false,
      "example": "rev_abc123"
    },
    {
      "name": "_createdAt",
      "type": "datetime",
      "description": "UTC timestamp when the document was created",
      "required": false,
      "example": "2026-01-15T10:00:00Z"
    },
    {
      "name": "_updatedAt",
      "type": "datetime",
      "description": "UTC timestamp when the document was last modified",
      "required": false,
      "example": "2026-05-01T14:30:00Z"
    }
  ],
  "notes": "Additional fields are document-type-specific and defined in the Sanity Studio schema."
}