Changeset 4087 for trunk/doc/pslib/psLibSDRS.tex

Timestamp:

Jun 2, 2005, 10:54:00 AM (21 years ago)

Author:

jhoblitt

Message:

add NULL keyword to Configuration files

File:

• trunk/doc/pslib/psLibSDRS.tex (modified) (2 diffs)

trunk/doc/pslib/psLibSDRS.tex

@@ -1 @@
-%%% $Id: psLibSDRS.tex,v 1.258 2005-06-02 04:13:41 jhoblitt Exp $
+%%% $Id: psLibSDRS.tex,v 1.259 2005-06-02 20:54:00 jhoblitt Exp $
 \documentclass[panstarrs,spec]{panstarrs}
 
@@ -4319 +4319 @@
 which should not form part of the key.
 
+\paragraph{NULL values}
+
+The ``value'' of a quad may be declare to be undefined with the ``NULL''
+keyword.  ``NULL'' is allowed to co-exist with a ``comment'' and may be
+surrounded by whitespace.  Any non-whitespace character will cause of the
+``value'' to be interpreted as a string.
+
+\begin{verbatim}
+foo     STR     NULL    # string with a NULL value
+bar     STR     NULL a  # string with a value of "NULL a"
+\end{verbatim}
+
 \paragraph{Types}
 \subparagraph{Scalar \& Vector}