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# attributeKeys

Overridden by subclasses to return the names of attributes of instances of the described class.

```
var attributeKeys: [String] { get }
```

## Return Value

An array of `NSString` objects containing the names of attributes of instances of the described class.

## Discussion

For example, a class description that describes Movie objects could return the attribute keys `title`, `dateReleased`, and `rating`.

If you have an instance of the class the receiver describes, you can use the `NSObject` instance method <doc://com.apple.documentation/documentation/ObjectiveC/NSObject-swift.class/attributeKeys> instead.

## See Also

[`toManyRelationshipKeys`](/documentation/Foundation/NSClassDescription/toManyRelationshipKeys)

Overridden by subclasses to return the keys for the to-many relationship properties of instances of the described class.

[`toOneRelationshipKeys`](/documentation/Foundation/NSClassDescription/toOneRelationshipKeys)

Overridden by subclasses to return the keys for the to-one relationship properties of instances of the described class.


---

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