---
title: "AttributesInput"
description: "which population's attributes to read"
section: concepts
address: /concepts/attributesinput
contract: 0476e35e6e275db5
---

# AttributesInput

which population's attributes to read

[figure: AttributesInput 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 |
|---|---|---|---|
| `population` | [Population](/concepts/population) | yes |  |
| `window` | [Window](/concepts/window) | no | the units read; the whole record when absent |



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