---
title: "Register"
description: "a register: a named list of rows whose shape is fixed and which grows by a row"
section: concepts
address: /concepts/register
contract: 0476e35e6e275db5
---

# Register

a register: a named list of rows whose shape is fixed and which grows by a row

[figure: Register is a row at platform scope. The drawing shows its fields and the objects that they point at.]

| property | value |
|---|---|
| kind | row |
| scope | platform |
| key | its name |
| store | postgres |
| family | registers |



## Fields


| field | type | required | note |
|---|---|---|---|
| `name` | `text` | yes |  |
| `row_type` | `text` | yes | the owning type of a row |
| `closed_or_rows` | `one of closed list in code \| rows` | yes | by the rule of §2.1 |
| `hash` | `hash` | yes | of its rows, served with every read |
| `version` | `count` | yes |  |
| `rows` | `[json]` | yes | the rows, each the serialization of the row type |



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