MathML ("Mathematical Markup Language") is an XML based markup language that is used to describe mathematical symbols and formulas, so that they can be presented in a familiar way in Web documents. It is a recommendation of the W3C math working group.
The specification of version 1.01 of the format was released in July 1999 and version 2.0 appeared in February 2001. Version 2.0 deals not only with the presentation but also with the meaning of formula components. The format is rather verbose and it is inconvenient to produce MathML formulas by hand; several utilities for doing so are available, including converters between TeX and MathML.
As of November 2003, the only two major web browsers directly supporting the format are Mozilla and Netscape Navigator version 7.1. However, other browsers support the format if external plugins are installed. For example, Internet Explorer 5.5+ will support MathML with MathPlayer plugin.
A system for marking up mathematical semantics, intended to complement MathML, is also under development. It is called OpenMath.
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