MathML

MathML (Mathematical Markup Language) is the standard for source code of mathematical formulas in the web.

It's a XML application to Maths, a W3C Recommendation, and part of HTML5 and EPUB 3. Current version is MathML 3.0.

As author, when you want to have a formula in a web page, you put a chunk of MathML code in it. As a user, your browser should process the code and show you the formula. Unfortunately, the MathML specification is big, and browsers currently process only a small fraction of it, so some formulas are not correctly shown. That's why there exist third-party solutions to edit and show the formulas of the web. WIRIS editor is a powerful formula editor that uses MathML to write and show formulas.

See how this formula is shown by Your browser vs WIRIS editor:

Learn more about MathML by looking at the Test Suite examples. Or learn more about WIRIS editor MathML flavor.