---
title: "WhatChanged"
description: "every number that moved, with its unit, and every figure replaced"
section: concepts
address: /concepts/whatchanged
contract: 0476e35e6e275db5
---

# WhatChanged

every number that moved, with its unit, and every figure replaced

[figure: WhatChanged 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 | two builds of one document |
| store | derived |
| family | documents |



## Fields


| field | type | required | note |
|---|---|---|---|
| `first` | `id` | yes |  |
| `second` | `id` | yes |  |
| `moved` | [NumberChange](/concepts/numberchange) | yes |  |
| `figures_replaced` | `[text]` | yes |  |



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