--- loncom/html/adm/help/tex/Author_LON-CAPA_Introduction.tex	2013/08/05 00:36:18	1.5
+++ loncom/html/adm/help/tex/Author_LON-CAPA_Introduction.tex	2013/08/14 03:33:06	1.6
@@ -51,3 +51,9 @@ The power of LON-CAPA for problem random
 
 Two computer algebra systems are interfaced to LON-CAPA, Maxima and R. This provides for algebra and calculus problems and responses. The R system has strong capabilities for statistics. Special script functions are provided to call Maxima and R to generate correct responses for a randomized problem, and also to check student responses.
 
+\textbf{Comments}
+
+Commenting you xml and scripts is important for both you and other users. Commenting within a loncapa/perl script 
+is denoted with a \#. This can be entered anwhere in a line and the remainder of the line will be ignored when
+parsing. Problems are coded in xml. Comments in xml are of the format \texttt{<!-- comment -->}.\index{comment markers}
+