Slot: key
The key.
URI: [linkmlmap:key](https://w3id.org/linkml/transformer/key)
## Applicable Classes
| Name | Description | Modifies Slot |
| --- | --- | --- |
| [KeyVal](KeyVal.md) | A generic key-value pair | no |
## Properties
### Type and Range
| Property | Value |
| --- | --- |
| Range | NONE |
| Domain Of | [KeyVal](KeyVal.md) |
### Cardinality and Requirements
| Property | Value |
| --- | --- |
| Required | Yes |
### Slot Characteristics
| Property | Value |
| --- | --- |
| Key | Yes |
| Owner | [KeyVal](KeyVal.md) |
## Identifier and Mapping Information
### Schema Source
* from schema: https://w3id.org/linkml/transformer
## Mappings
| Mapping Type | Mapped Value |
| --- | --- |
| self | linkmlmap:key |
| native | linkmlmap:key |
## LinkML Source
name: key
description: The key.
from_schema: https://w3id.org/linkml/transformer
rank: 1000
key: true
owner: KeyVal
domain_of:
- KeyVal
required: true