> ## Documentation Index
> Fetch the complete documentation index at: https://docs.encord.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Project ontology.classification option

## ClassificationOption Objects

```python theme={"dark"}
@dataclass
class ClassificationOption()
```

This class is DEPRECATED. We recommend using [Ontology](/sdk-documentation/sdk-references/ontology#ontology)

A dataclass which holds nested options for the [ClassificationAttribute](/sdk-documentation/sdk-references/project_ontology.classification_attribute#classificationattribute).

#### id

A unique (to the ontology) identifier of the option.

#### label

A description of the option.

#### value

A snake-case concatenated version of the label.

#### feature\_node\_hash

An 8-character hex string uniquely defining the option.