# [NTG-context] new module: streams

Thomas A. Schmitz thomas.schmitz at uni-bonn.de
Fri Mar 31 19:58:31 CEST 2006

Dear all,

as you may have seen in the lates release notes, ConTeXt has a new
feature: we have now streams for even and odd pages that can be
synchronized at certain points. This is useful for, e.g., typesetting
bilingual books: have the original on the even pages, the translation
on the odd pages, and synchronize at certain points. I was very
tenacious about it, and Hans has been characteristically generous
with his skills and his time and has implemented something. I'm sure
if some of you are interested, we will be able to refine it.

institute's website. Due to the system our university uses, it may
take until tomorrow until it's really visible at http://www.uni-
bonn.de/www/Philologie/Personal/Schmitz/Dateien.html It's a bilingual
(Greek-German) edition of a number of Greek texts for my lecture
course next semester. It's not perfect, but it shows how powerful
this new feature is. Have a look at it; if anybody is interested in
seeing the source code, just contact me, and I'll be happy to send it
along. Just a very brief explanation, if you want to try this at home:

In the module, Hans has suggested a few shortcuts to using it, so I
have in the preamble of the document:

\usemodule[streams]

\def\StartCouple{\page\SwitchToNormal}
\def\StopCouple {\SwitchToNormal \SynchronizeLeftAndRight
\FlushLeftAndRight}
\def\Original   {\SwitchToNormal\SynchronizeLeftAndRight\SwitchToLeft}
\def\Translation{\SwitchToRight}

So you put the part of your document where synchronization should
take place between \StartCouple and \StopCouple. After that ,
\Original and \Translation switches between even and odd pages.

I know that several people on the list asked for a similar feature,
and I'm very grateful to Hans for providing it.

Best

Thomas