# Class: Schema 



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






```mermaid
 classDiagram
    class Schema
    click Schema href "../Schema"
      Schema : fields
        
          
    
        
        
        Schema --> "*" Field : fields
        click Field href "../Field"
    

        
      Schema : foreignKeys
        
          
    
        
        
        Schema --> "*" ForeignKeys : foreignKeys
        click ForeignKeys href "../ForeignKeys"
    

        
      Schema : missingValues
        
      Schema : primaryKey
        
          
    
        
        
        Schema --> "*" Field : primaryKey
        click Field href "../Field"
    

        
      
```




<!-- no inheritance hierarchy -->


## Slots

| Name | Cardinality and Range | Description | Inheritance |
| ---  | --- | --- | --- |
| [fields](fields.md) | * <br/> [Field](Field.md) |  | direct |
| [missingValues](missingValues.md) | * <br/> [String](String.md) |  | direct |
| [primaryKey](primaryKey.md) | * <br/> [Field](Field.md) |  | direct |
| [foreignKeys](foreignKeys.md) | * <br/> [ForeignKeys](ForeignKeys.md) |  | direct |





## Usages

| used by | used in | type | used |
| ---  | --- | --- | --- |
| [Resource](Resource.md) | [schema](schema.md) | range | [Schema](Schema.md) |






## Identifier and Mapping Information







### Schema Source


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




## Mappings

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







## LinkML Source

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

### Direct

<details>
```yaml
name: Schema
from_schema: https://w3id.org/linkml/frictionless
slots:
- fields
- missingValues
- primaryKey
- foreignKeys
slot_usage:
  fields:
    name: fields
    inlined: true
    inlined_as_list: true

```
</details>

### Induced

<details>
```yaml
name: Schema
from_schema: https://w3id.org/linkml/frictionless
slot_usage:
  fields:
    name: fields
    inlined: true
    inlined_as_list: true
attributes:
  fields:
    name: fields
    examples:
    - value: id
    from_schema: https://w3id.org/linkml/frictionless
    rank: 1000
    alias: fields
    owner: Schema
    domain_of:
    - Reference
    - ForeignKeys
    - Schema
    range: Field
    multivalued: true
    inlined: true
    inlined_as_list: true
  missingValues:
    name: missingValues
    from_schema: https://w3id.org/linkml/frictionless
    rank: 1000
    alias: missingValues
    owner: Schema
    domain_of:
    - Schema
    multivalued: true
  primaryKey:
    name: primaryKey
    examples:
    - value: id
    from_schema: https://w3id.org/linkml/frictionless
    close_mappings:
    - linkml:identifier
    - linkml:unique_keys
    rank: 1000
    alias: primaryKey
    owner: Schema
    domain_of:
    - Schema
    range: Field
    multivalued: true
  foreignKeys:
    name: foreignKeys
    examples:
    - value: '[''$ref:ForeignKeys'', ''$ref:ForeignKeys'']'
    from_schema: https://w3id.org/linkml/frictionless
    rank: 1000
    alias: foreignKeys
    owner: Schema
    domain_of:
    - Schema
    range: ForeignKeys
    multivalued: true

```
</details>