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# IdentityDocumentRegistration

A protocol that defines an identity document registration.

```
protocol IdentityDocumentRegistration : Sendable
```

## Discussion

Each kind of document format needs its own concrete type that conforms to this protocol.

## Topics

### Instance Properties

[`var documentIdentifier: String`](/documentation/IdentityDocumentServices/IdentityDocumentRegistration/documentIdentifier)

An identifier that uniquely refers to the required document.

## Relationships

### Inherits From

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

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

### Conforming Types

[`MobileDocumentRegistration`](/documentation/IdentityDocumentServices/MobileDocumentRegistration)

---

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