Added chapter titles in comments
diff --git a/Doc/ref/ref.tex b/Doc/ref/ref.tex
index ff4e75b..ed4abc8 100644
--- a/Doc/ref/ref.tex
+++ b/Doc/ref/ref.tex
@@ -57,14 +57,14 @@
\pagenumbering{arabic}
-\include{ref1}
-\include{ref2}
-\include{ref3}
-\include{ref4}
-\include{ref5}
-\include{ref6}
-\include{ref7}
-\include{ref8}
+\include{ref1} % Introduction
+\include{ref2} % Lexical analysis
+\include{ref3} % Data model
+\include{ref4} % Execution model
+\include{ref5} % Expressions and conditions
+\include{ref6} % Simple statements
+\include{ref7} % Compound statements
+\include{ref8} % Top-level components
\inclide{ref.ind}
\end{document}