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# CMSampleBuffer.PerSampleAttachmentsDictionary

A structure that defines keys to identify per-sample attachments.

```
struct PerSampleAttachmentsDictionary
```

## Topics

### Specifying Keys

[`struct Key`](/documentation/CoreMedia/CMSampleBuffer/PerSampleAttachmentsDictionary/Key)

### Accessing Elements

[`subscript(CMSampleBuffer.PerSampleAttachmentsDictionary.Key) -> Any?`](/documentation/CoreMedia/CMSampleBuffer/PerSampleAttachmentsDictionary/subscript(_:))

## Relationships

### Conforms To

[`Sequence`](/documentation/Swift/Sequence)

---

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