\def\rcs$#1: #2${\expandafter\def\csname rcs#1\endcsname{#2}}
% example usage:
% \rcs$Version$
% Version \rcsVersion
distrib
>
Mandriva
>
current
>
i586
>
media
>
main-updates
>
by-pkgid
>
f84f86693cef76811d17f1f9082f2d47
>
files
>
106
