UK TeX FAQ -- question label extex

### The ExTeX project

The ExTeX project is building on the experience of the many existing TeX development and extension projects, to develop a new TeX-like system. The system is to be developed in Java, but will not necessarily use the code of NTS.

While ExTeX will implement all of TeX's primitives, some may be marked as obsolete, and "modern" alternatives provided (an obvious example is the primitive `\``input` command, whose syntax inevitably makes life difficult for users of modern operating system file paths). Desirable extensions from e-TeX, PDFTeX and Omega have been identified.

Usability will be another focus of the work: debugging support and log filtering mechanisms will please those who have long struggled with TeX macros.

ExTeX will accept Unicode input, from the start. In the longer term, drawing primitives are to be considered.

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