{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "root_id": {
      "type": "string",
      "pattern": "^rt_[0-9a-f]{32}$"
    },
    "space_id": {
      "type": "string",
      "pattern": "^spc_[0-9a-f]{32}$"
    },
    "position": {
      "type": "integer",
      "maximum": 9007199254740991,
      "minimum": 1
    }
  },
  "additionalProperties": false,
  "type": "object",
  "required": [
    "root_id",
    "space_id",
    "position"
  ],
  "title": "EntryRef",
  "description": "EntryRef is the occurrence identity of one entry: a position in one journal."
}