\documentclass{report}
\usepackage[usenames]{color}
\usepackage[english]{babel}
\usepackage[nohyphen]{underscore}
\usepackage[hyper]{listings}
\usepackage{setspace}
\usepackage{subcaption}
\usepackage{graphicx}
\usepackage{alltt}
\usepackage{calc}
\usepackage{makeidx}
\usepackage{amsmath,amssymb,amsfonts,textcomp}
\usepackage{hyperref}
\usepackage{titleref}
%\usepackage{showkeys}
\usepackage{longtable}
\hypersetup{colorlinks=true, linkcolor=blue, filecolor=blue, urlcolor=blue}
% Text styles
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% Outline numbering
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% Welcome to the 21\superscript{st} century.
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\newcommand{\nd}[0]{\superscript{nd}}
\newcommand{\rd}[0]{\superscript{rd}}
% Carl took 1\st place. Elly, Tom and Ann came in 2\nd, 3\rd and 4\th.

% Turn off making it permissible to break a word at an underscore.
% This is so the funcdef and funcdefv format correctly...
\makeatletter
\renewcommand{\BreakableUnderscore}{\leavevmode\nobreak
 \string_\nobreak}
\makeatother

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   {\hyperref[func:#1]{\lstinline[basicstyle=\normalsize]\!#1#2\!} [See Section~\ref{#1}]}
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   {\mbox{\bf\em #1}\null}

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 {\label{func:#1}\color{BrickRed}\begin{tabular}{@{}l@{}p{0.5in}}\large\bf\tt int \hypertarget{#1}{#1}\enspace(&\large\bf\tt #2)\\\index{#1!Definition}\end{tabular}\color{black}}
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 {\label{func:#1}\color{BrickRed}\begin{tabular}{@{}l@{}p{0.5in}}\large\bf\tt void \hypertarget{#1}{#1}\enspace(&\large\bf\tt #2)\\\index{#1!Definition}\end{tabular}\color{black}}
%
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\parskip 0.2cm
\parindent 0.0cm

\newcommand{\tab}{\hspace{5mm}}

\newcommand{\api}
   {\mbox{\em API Functions:\hspace{0.1in}}\null}

\newcommand{\exo}
   {\mbox{\sf EXODUS}\null}
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\newcommand{\versionud}{472}

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    \setlength{\leftmargin}{\labelwidth}
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    \setlength{\itemsep}{24pt}  % Between items
    \renewcommand{\makelabel}{\entrylabel}
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}
{\end{list}}
\input{exodus-lang.tex}

\newcommand\indexkeywords[1]{\index{{#1}}}
\newcommand\indexsymbols[1]{\index{{#1}}}
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backgroundcolor=\color{ListingBG},
basicstyle=\small\ttfamily,
keywordstyle=[0]\color{BrickRed}\textbf,
keywordstyle=[1]\color{BrickRed},
commentstyle=\color{LightBlue},
stringstyle=\color{ForestGreen},
numbers=left,numberstyle=\tiny\color{NumberGrey},
frame=leftline,framerule=3pt,rulecolor=\color{RuleGreen},
indexstyle=[1]\indexkeywords,
indexstyle=[2]\indexsymbols,
index=[1][keywords],
index=[2][keywords2]
}


\makeindex
\begin{document}
\include{00-Title}
\pagestyle{plain}
\cleardoublepage\tableofcontents
\newpage
\begin{center}
\vspace*{3in}
Intentionally Left Blank
\end{center}
\pagestyle{headings}
\include{01-Introduction}
\include{02-Changes}
\include{02-Development}
\include{03-DataObjects}
\include{04-API}
\include{00-References}
\appendix*
\include{App-NetCDF}
\include{App-Deprecated}
%\include{App-LargeModel}
\include{App-Example}

\include{index}

\refstepcounter{chapter}
\addcontentsline{toc}{chapter}{Index}

\begin{raggedright}
\begin{footnotesize}
\printindex
\end{footnotesize}
\end{raggedright}
\end{document}