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ExTeX

εχTEX aims at the development of a high quality typesetting system. This development is massively based on the experiences with the typesetting system TEX. Despite of its age TEX can still be considered a very good choice. Nevertheless design decisions which where reasonable at the time of the writing of TEX can nowadays no longer be considered as state of the art.

The stability of TEX is one of its virtues. On the other side it makes it hard to improve the system – even in the few areas which deserve improvements. The new millenium needs a system which is open for further development and at the same time compatible with TEX as much as reasonable.

History
In December 2002 a small group of experts and developers came together to initiate the development of a new derivate of TEX, based on NTS. Initially there were a few ideas and the necessity to familiarize with existing sources and TEX extensions. After a lot of experiments and examinations, and yet before the group’s first closed meeting from October 3rd to 5th 2003, it was clear that the ambitious goals could be achieved only if large parts of TEX – and with it NTS – were replaced. This led to the decision to develop a new Java-based system, using the experiences of NTS, ε-TEX, pdfTEX, and Ω (Omega) : εχTEX.

εχTEX is implemented in Java. Thus a Java runtime environment at least in version 1.5.0 is required. Java can be downloaded from java.sun.com. All other required libraries are part of the εχTEX distribution.
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εχTEX est écrit enJava. Thus a Java runtime environment at least in version 1.5.0 is required. Java can be downloaded from java.sun.com. All other required libraries are part of the εχTEX distribution.

http://www.extex.org