Slot: joins
Additional classes to be joined to derive instances of the target class
URI: [linkmlmap:joins](https://w3id.org/linkml/transformer/joins)
## Applicable Classes
| Name | Description | Modifies Slot |
| --- | --- | --- |
| [ClassDerivation](ClassDerivation.md) | A specification of how to derive a target class from a source class | no |
## Properties
### Type and Range
| Property | Value |
| --- | --- |
| Range | [AliasedClass](AliasedClass.md) |
| Domain Of | [ClassDerivation](ClassDerivation.md) |
### Cardinality and Requirements
| Property | Value |
| --- | --- |
| Multivalued | Yes |
### Slot Characteristics
| Property | Value |
| --- | --- |
| Owner | [ClassDerivation](ClassDerivation.md) |
## Comments
* supports cross-table lookups via source_key/lookup_key or the join_on field
## Identifier and Mapping Information
### Schema Source
* from schema: https://w3id.org/linkml/transformer
## Mappings
| Mapping Type | Mapped Value |
| --- | --- |
| self | linkmlmap:joins |
| native | linkmlmap:joins |
## LinkML Source
name: joins
description: Additional classes to be joined to derive instances of the target class
comments:
- supports cross-table lookups via source_key/lookup_key or the join_on field
from_schema: https://w3id.org/linkml/transformer
rank: 1000
owner: ClassDerivation
domain_of:
- ClassDerivation
range: AliasedClass
multivalued: true
inlined: true