[texhax] Invisible appendix

[Dan Hatton]

Dear All,

Imagine that I have a LaTeX file something like the one appended
below.  Also imagine that (at least on some runs) I don't want the
appendix to appear in the DVI (or postscript, or PDF, or whatever)
output.  Or, even better, for the appendix to appear in a separate PDF
or postscript file from the main body of the document.  But I do still
want the two \ref{}s to work.  Is there some way to do this, please?

(So far, I've been chopping up the finished output with pstops - but
now the publisher needs the LaTeX source, and I'm not sure I can rely
on them having access to pstops.)

Thanks,

Dan

\documentclass{article}

\begin{document}

\title{A summary of some horrendously detailed work}
\author{Dan}
\date{today}

\maketitle{}

\section{Keep it snappy}

Here, I summarize some work.  Anyone brave enough to read the details
can look at supplementary online material \ref{heretheyare}, which
contains figure \ref{pictureofit}.

\appendix{}

\section{Don't keep it snappy [intended as supplementary online material]}
\label{heretheyare}

Now I'll go on in lots and lots and lots of detail.
\begin{figure}
Not really a picture
\caption{Here's a picture.}
\label{pictureofit}
\end{figure}

\end{document}