> ## Documentation Index
> Fetch the complete documentation index at: https://docs.gobl.org/llms.txt
> Use this file to discover all available pages before exploring further.

# KeyDef

KeyDef defines a key that can be used inside a tax category.

## Schema ID

`https://gobl.org/draft-0/tax/regime-def#/$defs/KeyDef`

## Properties

| Title       | Property     | Type                                | Description                                                                                           |
| ----------- | ------------ | ----------------------------------- | ----------------------------------------------------------------------------------------------------- |
| Key         | `key`        | [cbc.Key](/draft-0/cbc/key)         | Key identifies this rate within the system                                                            |
| Name        | `name`       | [i18n.String](/draft-0/i18n/string) | Human name of the rate set                                                                            |
| Description | `desc`       | [i18n.String](/draft-0/i18n/string) | Useful description of the rate.                                                                       |
| No Percent  | `no_percent` | boolean                             | NoPercent when true implies that the rate when used in a tax Combo should not define a percent value. |