On 10 February 2009 وفا خلیقی wrote: > I never use PDFTeX. I only use TeX (the original TeX written by > Knuth) for typesetting my books, articles, papers and etc in > English. If I want to produce any Persian document then mostly use > XeTeX and sometimes LuaTeX.
If you run tex, i.e. you invoke it as tex on the command line, then you always get Knuth's TeX. There are not even other hyphenation patterns available than those Knuth provided himself. The only change that had been made is to adapt the program to the operating system you are using. This is encouraged by Knuth and is unavoidable anyway. Nobody is talking about changing anything else. > As a long time Plain TeX user, I only will accept changes from > Knuth not others and so other Plain TeX users. The discussion is about adding extensions to tex engines which had been extended already. These are etex, omega, pdftex, xetex, luatex, ... There is nothing wrong to add more extensions to them. I suppose the reason of your concerns is that it is not 100% clear what is meant with "extending plain". Well, it's not intended to change the file plain.tex. The idea is to add extensions when the format file for luatex is created, for example: \input plain \input extensions \dump This has absolutely no effect on Knuth's TeX. It only adds extensions to engines which had been extended already. There is no reason to be worried. Nobody intends to change the behavior of Knuth's TeX. And if you are using xetex or luatex, you already accept that the extensions had not been made by Knuth himself. These extensions had been designed carefully. If you don't use them, everything behaves as described in The TeXbook. Regarding luatex, there are probably two exceptions: The line breaking algorithm had been revised and the future of DVI output is unclear ATM because Knuth's DVI format is too limited. xetex already uses an extended variant of Knuth's DVI. Regards, Reinhard -- ---------------------------------------------------------------------------- Reinhard Kotucha Phone: +49-511-3373112 Marschnerstr. 25 D-30167 Hannover mailto:[email protected] ---------------------------------------------------------------------------- Microsoft isn't the answer. Microsoft is the question, and the answer is NO. ----------------------------------------------------------------------------
