# Class: ForeignKeys



URI: [frictionless:ForeignKeys](https://w3id.org/linkml/frictionless/ForeignKeys)




```mermaid
 classDiagram
    class ForeignKeys
      ForeignKeys : constraint_name
        
          ForeignKeys --> None : constraint_name
        
      ForeignKeys : fields
        
          ForeignKeys --> Field : fields
        
      ForeignKeys : reference
        
          ForeignKeys --> Reference : reference
        
      
```




<!-- no inheritance hierarchy -->


## Slots

| Name | Cardinality and Range | Description | Inheritance |
| ---  | --- | --- | --- |
| [fields](fields.md) | 0..* <br/> [Field](Field.md) |  | direct |
| [reference](reference.md) | 0..1 <br/> [Reference](Reference.md) |  | direct |
| [constraint_name](constraint_name.md) | 0..1 <br/> [String](String.md) |  | direct |





## Usages

| used by | used in | type | used |
| ---  | --- | --- | --- |
| [Schema](Schema.md) | [foreignKeys](foreignKeys.md) | range | [ForeignKeys](ForeignKeys.md) |






## Identifier and Mapping Information







### Schema Source


* from schema: https://w3id.org/linkml/frictionless





## Mappings

| Mapping Type | Mapped Value |
| ---  | ---  |
| self | frictionless:ForeignKeys |
| native | frictionless:ForeignKeys |





## LinkML Source

<!-- TODO: investigate https://stackoverflow.com/questions/37606292/how-to-create-tabbed-code-blocks-in-mkdocs-or-sphinx -->

### Direct

<details>
```yaml
name: ForeignKeys
from_schema: https://w3id.org/linkml/frictionless
slots:
- fields
- reference
- constraint_name
slot_usage:
  fields:
    name: fields
    domain_of:
    - Reference
    - ForeignKeys
    - Schema
    inlined: false
  range:
    name: range
    id_prefixes:
    - Any

```
</details>

### Induced

<details>
```yaml
name: ForeignKeys
from_schema: https://w3id.org/linkml/frictionless
slot_usage:
  fields:
    name: fields
    domain_of:
    - Reference
    - ForeignKeys
    - Schema
    inlined: false
  range:
    name: range
    id_prefixes:
    - Any
attributes:
  fields:
    name: fields
    from_schema: https://w3id.org/linkml/frictionless
    rank: 1000
    multivalued: true
    alias: fields
    owner: ForeignKeys
    domain_of:
    - Reference
    - ForeignKeys
    - Schema
    range: Field
    inlined: false
  reference:
    name: reference
    from_schema: https://w3id.org/linkml/frictionless
    rank: 1000
    alias: reference
    owner: ForeignKeys
    domain_of:
    - ForeignKeys
    range: Reference
  constraint_name:
    name: constraint_name
    examples:
    - value: dcc_project_fkey
    from_schema: https://w3id.org/linkml/frictionless
    rank: 1000
    alias: constraint_name
    owner: ForeignKeys
    domain_of:
    - ForeignKeys

```
</details>