---
title: "Basis"
description: "how well founded a fact or a number is"
section: concepts
address: /concepts/basis
contract: 0476e35e6e275db5
---

# Basis

how well founded a fact or a number is

[figure: Basis 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 | kernel |



## Fields


| field | type | required | note |
|---|---|---|---|
| `basis` | `one of observed \| stated by a source \| derived by a named rule \| estimated with an interval \| measured \| inferred \| never measured` | yes |  |
| `rule` | `text` | no | the named rule, for derived |
| `interval` | [Interval](/concepts/interval) | no | for estimated |



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