---
title: "Rung"
description: "one rung: a predicate with its own coverage, mapped to one of the seven stages"
section: concepts
address: /concepts/rung
contract: 0476e35e6e275db5
---

# Rung

one rung: a predicate with its own coverage, mapped to one of the seven stages

[figure: Rung is a value at none scope. The drawing shows its fields and the objects that they point at.]

| property | value |
|---|---|
| kind | value |
| scope | none |
| key | none |
| store | none |
| family | rules_engine |



## Fields


| field | type | required | note |
|---|---|---|---|
| `name` | `text` | yes |  |
| `predicate` | `hash` | yes |  |
| `stage` | [Stage](/concepts/stage) | yes |  |
| `good_for` | `duration` | yes | how long evidence at this rung stays fresh |
| `rate_to_next` | [NumberInPosition](/concepts/numberinposition) | no | the share that reaches the rung above, measured, estimated or stipulated |



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