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  "identifier" : "/documentation/Foundation/XMLDocument/dtd",
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# dtd

Returns an [`XMLDTD`](/documentation/Foundation/XMLDTD) object representing the internal DTD associated with the receiver.

```
@NSCopying var dtd: XMLDTD? { get set }
```

## Return Value

An [`XMLDTD`](/documentation/Foundation/XMLDTD) object representing the internal DTD associated with the receiver or `nil` if no DTD has been associated.

---

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