---
title: "ArmPlayInput"
description: "the play, inside a strategy, for a brand, and the share it is armed on with its holdout: a share under one makes the play an experiment"
section: concepts
address: /concepts/armplayinput
contract: 0476e35e6e275db5
---

# ArmPlayInput

the play, inside a strategy, for a brand, and the share it is armed on with its holdout: a share under one makes the play an experiment

[figure: ArmPlayInput 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 | harness |



## Fields


| field | type | required | note |
|---|---|---|---|
| `play` | `id` | yes |  |
| `strategy` | `id` | yes |  |
| `brand` | `id` | yes |  |
| `arm` | `bool` | yes |  |
| `share` | `share` | no | the share of the admitted members the arming admits; absent keeps the play's own |
| `holdout` | `share` | no | the share left alone at random, read as the effect's comparison; absent keeps the play's own |



## Routes that use it
- [`/v1/act/arm_play`](/reference/act/arm_play) takes it as input