ANSI/NISO Z39.96-2015

10 Article Authoring Tag Set, version 1.1 • 10.5 Attributes

10.5.119 @xmlns:mml MathML Namespace Declaration

This is not an attribute, but the namespace pseudo-attribute. The value provides a prefix to use for the MathML elements. All namespace prefixes must be associated with a URL, and the prefix mml has been set to the URL for the World Wide Web Consortium (W3C) MathML Tag Set. The same URL is the same for both MathML 2.0 and MathML 3.0.

In elements <article> and <mml:math>, this attribute must have the value http://www.w3.org/1998/Math/MathML (as given below).
Value Meaning
http://www.w3.org/1998/Math/MathML The prefix mml has been set to the URL for the W3C MathML Tag Set.