On Sat, Mar 14, 2009 at 5:32 AM, Wei-Wei Guo <wwguocn@gmail.com> wrote:
Dear all,

I'm reading the source file of t-bib. I find there are lots of '\c!', '\s!', and
'\v!'. What do they mean? I searched in wiki, TeXBook, ConTeXt manual, TeX impatient,
and mail list. Those commands appear some times, but no explanation.
 
http://archive.contextgarden.net/message/20080629.104105.40e28a70.el.html
 
 
Another question is related the following codes from Taco (thank you, Taco). There
are tokens like '\??pb @lang@`. What does it mean? Could you tell me, to get deep
understanding, what to read or which part to read in TeXBook or some other manuals.
I don't know what to search to find related topics.

 \unprotect
 \def\lang#1%
  {\def\biblanguage{#1}%
   \ifcsname \??pb @lang@#1\endcsname
       \expanded{\mainlanguage[\getvalue{\??pb @lang@#1}]}%
       \expanded{\language[\getvalue{\??pb @lang@#1}]}%
    \fi \ignorespaces}
  \protect


Best wishes,
Wei-Wei