---
title: "PopulationAttributes"
description: "the attributes a population's units carry, read from the units themselves in one bounded scan, so a composer offers only what the record holds and a strata choice rests on counts"
section: concepts
address: /concepts/populationattributes
contract: 0476e35e6e275db5
---

# PopulationAttributes

the attributes a population's units carry, read from the units themselves in one bounded scan, so a composer offers only what the record holds and a strata choice rests on counts

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

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



## Fields


| field | type | required | note |
|---|---|---|---|
| `population` | [Population](/concepts/population) | yes |  |
| `units_read` | `count` | yes |  |
| `units_in` | `count` | yes |  |
| `partial` | [PartialAnswer](/concepts/partialanswer) | no | when the budget ran out |
| `attributes` | [AttributeCount](/concepts/attributecount) | yes | most carried first |
| `as_of` | `time` | yes |  |



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