Slot: lookup_key
column in the secondary (joined) table used as the join key
URI: [linkmlmap:slot/lookup_key](https://w3id.org/linkml/transformer/slot/lookup_key)
## Applicable Classes
| Name | Description | Modifies Slot |
| --- | --- | --- |
| [AliasedClass](../classes/AliasedClass.md) | alias-class key value pairs for classes | no |
## Properties
### Type and Range
| Property | Value |
| --- | --- |
| Range | NONE |
| Domain Of | [AliasedClass](../classes/AliasedClass.md) |
### Slot Characteristics
| Property | Value |
| --- | --- |
| Owner | [AliasedClass](../classes/AliasedClass.md) |
## Identifier and Mapping Information
### Schema Source
* from schema: https://w3id.org/linkml/transformer
## Mappings
| Mapping Type | Mapped Value |
| --- | --- |
| self | linkmlmap:lookup_key |
| native | linkmlmap:lookup_key |
## LinkML Source
name: lookup_key
description: column in the secondary (joined) table used as the join key
from_schema: https://w3id.org/linkml/transformer
rank: 1000
owner: AliasedClass
domain_of:
- AliasedClass