<!--
{
  "availability" : [
    "iOS: -",
    "iPadOS: -",
    "macCatalyst: -",
    "macOS: -",
    "visionOS: -",
    "watchOS: -"
  ],
  "documentType" : "symbol",
  "framework" : "HealthKit",
  "identifier" : "/documentation/HealthKit/HKDocumentTypeIdentifier",
  "metadataVersion" : "0.1.0",
  "role" : "Structure",
  "symbol" : {
    "kind" : "Structure",
    "modules" : [
      "HealthKit"
    ],
    "preciseIdentifier" : "c:@T@HKDocumentTypeIdentifier"
  },
  "title" : "HKDocumentTypeIdentifier"
}
-->

# HKDocumentTypeIdentifier

The identifiers for documents.

```
struct HKDocumentTypeIdentifier
```

## Overview

To create an [`HKDocumentType`](/documentation/HealthKit/HKDocumentType) instance, pass an [`HKDocumentTypeIdentifier`](/documentation/HealthKit/HKDocumentTypeIdentifier) value to the [`documentType(forIdentifier:)`](/documentation/HealthKit/HKObjectType/documentType(forIdentifier:)) method.

For the complete list of quantity type identifiers, see Document Types.

## Topics

### Document Types

[`CDA`](/documentation/HealthKit/HKDocumentTypeIdentifier/CDA)

The CDA Document type identifier, used when requesting permission to read or share CDA documents.

### Initializers

[`init(rawValue:)`](/documentation/HealthKit/HKDocumentTypeIdentifier/init(rawValue:))

Returns a newly initialized document type identifier using the provided string.


---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)