# XHTML 1.0 Strict

Source: https://xmlvalid.com/schemas/xhtml-1.0-strict

> The Strict document type of XHTML 1.0, for pages and content exports written as XML.

XHTML 1.0 Strict is HTML 4 written as XML, without presentational elements such as font and center.

- Type: DTD
- Version: 1.0 (second edition)
- Namespace: `http://www.w3.org/1999/xhtml`
- Root element: `html`
- Publisher: W3C (W3C Software and Document License), source: https://www.w3.org/TR/xhtml1/
- Validate against it: https://xmlvalid.com/validate?schema=xhtml-1.0-strict

## Notes

- The DTD is applied to the document as given. Named entities such as or © are only known when the DTD is read while parsing, which the browser cannot do for a DOCTYPE that points at w3.org. Use character references ( , ©) or the five XML entities.