Tweak afw section

afw.tex

@@ -16,10 +16,18 @@ \subsection{Time and Hierarchical Data Structures}
 
 \texttt{PropertySet} and \texttt{PropertyList} to allow \texttt{dict}-like data structures to be passed from Python to C++ and back again.
 
-\subsection{Astronomy Framework}
+\subsection{Application Framework}
 \label{sec:afw}
-\texttt{afw}
-
-AST library \citep{2016A&C....15...33B} backs the world coordinate system handling.
+\texttt{afw} -- this is called the ``Application Framework'' in \citet{2010SPIE.7740E..15A}\footnote{This document can be downloaded from \url{https://ls.st/Document-9349}}
+
+\begin{itemize}
+\item Image/MaskedImage/Exposure
+\item Table and Catalogs.
+\item Detection
+\item Math
+\item Camera geometry
+\item FITS I/O
+\item WCS: AST library \citep{2016A&C....15...33B} backs the world coordinate system handling.
+\end{itemize}
 
 \texttt{coadd\_utils} ?