Le jeudi 22/04/10 à 16h42, Hans Hagen a écrit :

so use the [][] variant instead ({}{} is for inline)

OK, that's better :) But the following MCE: \documentclass{article} \usepackage{etex,m-pictex,m-ch-en} \begin{document} \startchemical \chemical[2H_2,PLUS,O_2,GIVES,2H_2O] \stopchemical \end{document} leads to the messages: ppchtex : unknown chemical definition 2H_2 ppchtex : unknown chemical definition O_2 ppchtex : unknown chemical definition 2H_2O and, indeed, only the "+" sign and the arrow are printed. Thanks. -- Denis

On 22-4-2010 7:09, Denis Bitouzé wrote:

Are those changes:

1. {}{} rather than [][],

2. pair \startchemical, \stopchemical or not,

3. etc.

documented somewhere?

sure, in the ppchtex manual; indeed {}{} is used inline (in math mode or not) and [][] between start/stop pairs Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------

On 22-4-2010 7:09, Denis Bitouzé wrote:

Are those changes:

1. {}{} rather than [][],

2. pair \startchemical, \stopchemical or not,

3. etc.

btw, in mkiv ppchtex is reimplemented; it still has some flaws but it has more room for extensions and is now part of the context mkiv kernel Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------

On 23-4-2010 7:37, Denis Bitouzé wrote:

Le jeudi 22/04/10 à 23h32, Hans Hagen a écrit :

...

btw, in mkiv ppchtex is reimplemented; it still has some flaws but it has more room for extensions and is now part of the context mkiv kernel

As I'm not using ConTeXt for the moment (but it may change! :), what are the consequences of this for a LaTeX user?

we have context mkii and context mkiv; the new ppchtex module is for mkiv and uses a combination of lua, tex and mp; as context and latex are quite different (and even more when you consider mkiv) the new ppchtex code targets at context Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------