\begin{theindex}
\def\bigletter#1{{\Large\sffamily#1}\nopagebreak\vspace{1mm}}

  \bigletter P
  \item project files, \hyperpage{35}

  \indexspace
  \bigletter X
  \item xmlada-config, \hyperpage{35}
  \item xmlada.gpr, \hyperpage{35}

\end{theindex}
