\documentclass{beamer}
\mode<presentation>{
  \usetheme{Copenhagen}
  % or ...
%   \usecolortheme{seagull}

  \setbeamercovered{transparent}
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}

\usepackage[english]{babel}
% or whatever

\usepackage[latin1]{inputenc}
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\usepackage{times}
\usepackage[T1]{fontenc}

\usepackage{soul}
\usepackage{beamertexpower}

\title % (optional, use only with long paper titles)
{Nested RESOURCE Elements}

\author[R. Wagner] % (optional, use only with lots of authors)
{Rick Wagner}

\institute[Universities of California, San Diego] % (optional, but mostly needed)
{
  Laboratory for Computational Astrophysics,\\
  San Diego Supercomputer Center \\
}
\date[VOTable] % (optional)
{May 28, 2009}

\subject{Talks}

\begin{document}

\begin{frame}[t]
  \titlepage
\end{frame}

\section{Overview}

\begin{frame}[t]
  \frametitle{Hierarchical Structure of Simulation Data}
  \begin{center}
    \includegraphics[height=2.75in]{TheoryFileDataModel.png}
  \end{center}
\end{frame}

\begin{frame}[t]
  \frametitle{Describing in VOTable}
  Theory data has many nested structures
  \begin{itemize}
    {\item Simulations}
    \begin{itemize}
      {\item Snapshot/Dataset}
      \begin{itemize}
        {\item Files}
      \end{itemize}
    \end{itemize}
  \end{itemize}
Internal structure of files can also be nested
  \begin{itemize}
    {\item File}
    \begin{itemize}
      {\item Grid}
      \begin{itemize}
        {\item Array/Property}
      \end{itemize}
    \end{itemize}
  \end{itemize}
\end{frame}

\begin{frame}[t]
  \frametitle{Use Case}
  \begin{itemize}
    {\item We need a way to describe {\em simple} internal file
      formats.}
    {\item Choices seem to be:}
    \begin{itemize}
      {\item Relational TABLEDATA}
      {\item Nested RESOURCEs (Preferred)}
    \end{itemize}
  \end{itemize}
  \begin{itemize}
    {\item {\tt RESOURCE utype="SimDB.Snapshot"}}
    {\item \ldots Snaphot metadata \ldots }
    \begin{itemize}
      {\item {\tt RESOURCE utype="TDFF.File"}}
      {\item \ldots File metadata, access reference \ldots }
      \begin{itemize}
        {\item {\tt TABLE utype="TDFF.Array"}}
        {\item \ldots Table of arrays metadata \ldots }
      \end{itemize}
    \end{itemize}
  \end{itemize}
\end{frame}

\begin{frame}[t]
  \frametitle{Questions \& Comments}
  \begin{itemize}
    {\item Is this trivial? Can I sit down now?}
    {\item The VOTable Schema permits this,but:}
    \begin{itemize}
      {\item Very different from other services}
      {\item Requires more client knowledge}
      {\item This is OK for us, since we have to write the tools anyways}
    \end{itemize}
    {\item I've heard of other use cases (VOSpace)}
    {\item This could be a general means for serializing data models
      in VOTable}
    \begin{itemize}
      {\item Map classes to RESOURCE}
      {\item Map attributes to PARAM or TABLEDATA}
  \end{itemize}
  \end{itemize}
\end{frame}

\end{document}
