In May 2017, MathBook XML was renamed PreTeXt in order to suggest that it is suitable for much more than writing mathematics books. Its development began on the first UTMOST and is continuing with the current project. Three of the basic principles guiding the design of PreTeXt (PTX for short) are

• PreTeXt is a markup language that captures the structure of textbooks and research papers in the mathematical sciences.
• PreTeXt is human-readable and human-writable.
• PreTeXt documents serve as a single source which can be easily converted to multiple other formats, current and future.

To find out more about PreTeXt, to get started writing mathematics with PreTeXt, to see examples and read the documentation, refer to the PreTeXt website.