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

  \setbeamercovered{transparent}
  % or whatever (possibly just delete it)
}

\usepackage[english]{babel}
% or whatever

\usepackage[latin1]{inputenc}
% or whatever

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

\usepackage{soul}
\usepackage{beamertexpower}

\title % (optional, use only with long paper titles)
{SimDAP}
\subtitle{Simulation Data Access Protocol}

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

\institute[Universities of California, San Diego] % (optional, but mostly needed)
{
  Laboratory for Computational Astrophysics,\\
  University of California, San Diego \\
  High Performance System Division\\
  CINECA, Bologna, Italy
}
\date[SimDAP] % (optional)
{October 28, 2008}

\subject{Talks}

\begin{document}

\begin{frame}
  \titlepage
\end{frame}

\section{Overview}

\begin{frame}
\frametitle{Current Theory Standards}
\begin{description}
\item[SimDB Data Model] Is the data model describing simulations, including protocols (software), experiments (simulations), and snapshots (time based output).
\item[SimDB] Will be a service specific for querying a database populated with objects based on the data model.
\item[SimDAP] Is a second generation DAL typed service interface, providing access to existing and virtual simulation datasets.
\end{description}
\end{frame}

\begin{frame}
  \frametitle{SimDAP Goals}
  \begin{itemize}
  \item Provide a service standard for retrieving simulation data
  \item Mimic other second generation DAL protocols (e.g., TAP, SSAP, etc.)
  \item Low technical overhead for implementation
  \end{itemize}
\end{frame}

\begin{frame}
  \frametitle{Important Data Model Elements}
  \begin{description}
  \item[Protocol] A piece of software (Enzo, Gadge, halo finders)
  \item[Experiment] (i.e., Simulation) the process of running a piece of software with a set of input parameters.
  \item[Snapshot] Results of the simulation at some point in time. Could be in files or a database.
  \end{description}

  \begin{itemize}
  \item Data model is still evolving
  \item Will likely add Project to collect multiple Experiments and Protocols
  \end{itemize}

\end{frame}

\begin{frame}
  \frametitle{Minimum Service Operations}
  \begin{description}
  \item[GetCapabilities] VOSI compliant response
  \item[GetAvailability] VOSI compliant response
  \item[Download] Return access URLs to unmodified simulation results
  \item[Preview] Return access URLs to existing or virtual images or down-sampled data
  \item[Cutout] Return access URLs to files containing a spatial subset of the data (i.e., REGION)
  \item[List] (Tentative) Return access URLs to XML instance documents describing the Experiments being served.
  \end{description}
  \begin{itemize}
  \item Will provide asynchronous operations via UWS, when available.
  \item Service can extend these to provide custom operations (volume rendering, projection, etc.).
  \end{itemize}
\end{frame}

\begin{frame}
  \frametitle{Basic Input Parameters}
  \begin{description}
  \item[EXPERIMENT] The simulation of interest
  \item[SNAPSHOT] The time step of interest
  \item[REGION] Spatial region used when doing a cutout
  \item[PROPERTIES] Properties of the data desired (e.g., density, temperature, position)
  \end{description}
\end{frame}

\begin{frame}
  \frametitle{Sample Queries}
  \begin{block}{Simple Download}
{\tt  \$<service-baseURL>/sync?REQUEST=download\&\\}
{\tt  EXPERIMENT=lca/sca/clrc00\&SNAPSHOT=clrc00\_0030}
\end{block}

\begin{block}{Cutout with Properties}
{\tt  \$<service-baseURL>/sync?REQUEST=download\&\\}
{\tt  EXPERIMENT=lca/sca/clrc00\&SNAPSHOT=clrc00\_0030\&\\}
{\tt  REGION=0.25/0.5,0.25/0.5,0.0/1.0\&PROPERTIES=Density,Temperature}
\end{block}

(Exact details of parameters TBD.)
\end{frame}

\begin{frame}
  \frametitle{Theory Discussion Items}
  \begin{itemize}
  \item How much metadata to provide in response?
  \item How much of a description of the underlying file structure is needed?
  \item How do Experiment, Snapshot compare to the SSA Collection?
  \end{itemize}
  Attendance by DAL members at Thursday's Theory session on SimDAP would be appreciated.
\end{frame}

\begin{frame}
  \frametitle{Future}
  \begin{itemize}
  \item Resolve discussion items (this week)
  \item Draft Note (also this week)
  \item Present Working Draft to DAL WG for review (1 - 2 months)
  \end{itemize}
\end{frame}

\end{document}
