# Class: Expression
URI: [omoschema:Expression](https://w3id.org/oak/ontology-metadata/Expression)
```{mermaid}
classDiagram
class Expression
Expression <|-- ClassExpression
Expression <|-- PropertyExpression
```
## Inheritance
* **Expression**
* [ClassExpression](ClassExpression.md)
* [PropertyExpression](PropertyExpression.md)
## Slots
| Name | Cardinality and Range | Description | Inheritance |
| --- | --- | --- | --- |
## Mixin Usage
| mixed into | description |
| --- | --- |
## Identifier and Mapping Information
### Schema Source
* from schema: https://w3id.org/oak/ontology-metadata
## Mappings
| Mapping Type | Mapped Value |
| --- | --- |
| self | omoschema:Expression |
| native | omoschema:Expression |
## LinkML Source
### Direct
```yaml
name: Expression
from_schema: https://w3id.org/oak/ontology-metadata
mixin: true
```
### Induced
```yaml
name: Expression
from_schema: https://w3id.org/oak/ontology-metadata
mixin: true
```