
Version 3 of the MathML specification was released as a W3C recommendation on 20 October 2010. When MathML is used in HTML (as opposed to XML) this namespace is automatically inferred by the HTML parser and need not be specified in the document. However, it was assigned a namespace immediately after the Namespace Recommendation was completed, and for XML use, the elements should be in the namespace with namespace URL. MathML was originally designed before the finalization of XML namespaces. In October 2003, the second edition of MathML Version 2.0 was published as the final release by the W3C Math Working Group. Version 1.01 of the format was released in July 1999 and version 2.0 appeared in February 2001.

MathML 1 was released as a W3C recommendation in April 1998 as the first XML language to be recommended by the W3C.

2.2.1 Wikidata annotation in Content MathML.
