NISO has released JATS: Journal Article Tag Suite, ANSI/NISO Z39.96-2012.
Here's an excerpt from the press release:
The National Information Standards Organization (NISO) announces the publication of a new American National Standard, JATS: Journal Article Tag Suite, ANSI/NISO Z39.96-2012. JATS provides a common XML format in which publishers and archives can exchange journal content by preserving the intellectual content of journals independent of the form in which that content was originally delivered. In addition to the element and attribute descriptions, three journal article tag sets (the Archiving and Interchange Tag Set, the Journal Publishing Tag Set, and the Article Authoring Tag Set) are part of the standard. While designed to describe the textual and graphical content of journal articles, it can also be used for some other materials, such as letters, editorials, and book and product reviews. "Al