---
title: "LogLine"
description: "one structured log line: time, role, run, level, a message in plain words, and the trace it belongs to; secret values are redacted before export"
section: concepts
address: /concepts/logline
contract: 0476e35e6e275db5
---

# LogLine

one structured log line: time, role, run, level, a message in plain words, and the trace it belongs to; secret values are redacted before export

[figure: LogLine is a fact at platform scope. The drawing shows its fields and the objects that they point at.]

| property | value |
|---|---|
| kind | fact |
| scope | platform |
| key | its id |
| store | lake:landed |
| family | observability |



## Fields


| field | type | required | note |
|---|---|---|---|
| `at` | `time` | yes |  |
| `role` | `text` | yes |  |
| `run` | `id` | no |  |
| `level` | `one of debug \| info \| warn \| error` | yes |  |
| `message` | `text` | yes | plain words; never a code name a customer reads |
| `context` | [TelemetryContext](/concepts/telemetrycontext) | no |  |
| `fields` | `{text:text}` | no |  |



## Routes that use it
No route takes or returns LogLine directly. The record holds it, and the objects that point at it reach it.