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title: Dtd (dw::xml::Dtd)
collection: mulesoft
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locale: en-us
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---
product: DataWeave
version: 2.9
---

# Dtd (dw::xml::Dtd)

> For the full documentation index, see: https://docs.mulesoft.com/llms.txt

This module contains helper functions for working with XML doctype declarations.

To use this module, you must import it to your DataWeave code, for example, by adding the line
`import * from dw::xml::Dtd` to the header of your DataWeave script.

_Introduced in DataWeave version 2.5.0._

## Functions

<table><colgroup><col> <col></colgroup><thead><tr><th>Name</th><th>Description</th></tr></thead><tbody><tr><td><p><a href="https://docs.mulesoft.com/dataweave/2.9/dw-dtd-functions-doctypeasstring">docTypeAsString</a></p></td><td><p>Transforms a <code>DocType</code> value to a string representation.</p></td></tr></tbody></table>

## Types

- [Dtd Types](https://docs.mulesoft.com/dataweave/2.9/dw-dtd-types)