[Merrill]

>The Journal Article Tag Suite (JATS) is an XML format used to describe scientific literature published online. It is a technical standard developed by the National Information Standards Organization (NISO) and approved by the American National Standards Institute with the code Z39.96-2012.

https://en.wikipedia.org/wiki/Journal_Article_Tag_Suite

>LaTeXML is a free, public domain software, which converts LaTeX documents to XML, HTML, EPUB, JATS and TEI.

https://en.wikipedia.org/wiki/LaTeXML

The wonderful thing about standards is that there are so many of them. And each one has variations.