XML.com FAQs > C. Authors of SGML (including writers of HTML: Web page owners)
Question:  C.17 Can I do mathematics using XML?

Yes, if the document type you use provides for math. The mathematics-using community is developing software, and there is a MathML Recommendation at the W3C, which is a native XML application. It would also be possible to make XML fragments from other DTDs, such as the long-expired HTML3, the near-obsolete HTML Pro, or ISO 12083 Math, or OpenMath, or one of your own making. Browsers which display some math embedded in SGML already exist (eg DynaText, Panorama, Multidoc Pro).

This FAQ is from The XML FAQ, maintained by Peter Flynn