\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[palatino, helvetica, courier, maths=cmr]{mdwfonts}
+\usepackage{makeidx}
+\usepackage
+ [columns=2, itemlayout=singlepar, justific=raggedright,
+ totoc=true, font=small]
+ {idxlayout}
\usepackage{tikz}
\usepackage{syntax}
\usepackage{sverb}
%%%--------------------------------------------------------------------------
\part{Reference} \label{p:ref}
+\include{refintro}
\include{concepts}
\include{cmdline}
\include{syntax}
%%%--------------------------------------------------------------------------
\backmatter
-\input{sod.ind}
+\printindex
%%%----- That's all, folks --------------------------------------------------
\end{document}