\documentclass{article}

% Use the Cactus ThornGuide style file
% (Automatically used from Cactus distribution, if you have a 
%  thorn without the Cactus Flesh download this from the Cactus
%  homepage at www.cactuscode.org)
\usepackage{../../../../doc/ThornGuide/cactus}

\begin{document}

\title{SpaceMask}
\author{Tom Goodale}
\date{$ $Date$ $}

\maketitle

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\begin{abstract}
Provides a mask function for the spatial slice variables
\end{abstract}

\section{Purpose}

This will provide two integer grid functions

space\_mask
space\_table\_field

the first one will be a bitmask describing the point, with one bit
indicating that there is extra data in a table the handle of which can be
found in the corresponding point in the space\_table\_field.

Thorns interested in the mask should inherit from this implementation.

There may also be aliased query functions provided.

\section{Comments}

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\end{document}