---
title: insertionKey
framework: foundation
role: symbol
role_heading: Instance Property
path: foundation/nspositionalspecifier/insertionkey
---

# insertionKey

Returns the key that identifies the relationship into which the new or copied object or objects should be inserted.

## Declaration

```swift
var insertionKey: String? { get }
```

## Return Value

Return Value A key. Determined by evaluating the receiver.

## See Also

### Accessing information about a positional specifier

- [insertionContainer](foundation/nspositionalspecifier/insertioncontainer.md)
- [insertionIndex](foundation/nspositionalspecifier/insertionindex.md)
- [insertionReplaces](foundation/nspositionalspecifier/insertionreplaces.md)
- [objectSpecifier](foundation/nspositionalspecifier/objectspecifier.md)
- [position](foundation/nspositionalspecifier/position.md)
- [setInsertionClassDescription(_:)](foundation/nspositionalspecifier/setinsertionclassdescription(_:).md)