diff --git a/doc/userman/description.tex b/doc/userman/description.tex
index 1070006b615deb656f2d592d407e8fcf7ea5f27d..6604f0cd2d6f8565c07b23f9015d2418d0f92cae 100644
--- a/doc/userman/description.tex
+++ b/doc/userman/description.tex
@@ -1,3 +1,16 @@
+The \fclang plug-in intends to provide a full translation of C++ and \acslpp into the \framac internal representation, and from there be able to be analyzed by other \framac plug-ins. This is a work in progress. The following sections describe the  limitations of the current implementation.
+\begin{itemize}
+	\item The plug-in aims for the TBD version of C++
+	\item \acslpp is described in the companion \acslpp reference manual, also a part of the \framac release.
+\end{itemize}
+
+
+Notes
+\begin{itemize}
+	\item Which version of Clang?
+	\item Clang (8) support C++98 (except exported templates, later removed) and C++11 and current draft standard for C++1y 
+	\item see https://clang.llvm.org/docs/UsersManual.html\#cxx for supported features in clang C++
+\end{itemize}
 
 \chapter{Installation}
 
@@ -115,3 +128,5 @@ In particular, a debug value of 1 shows the command-line that invokes
 \end{itemize}
 
 
+TBD - including command-line options
+
diff --git a/doc/userman/eacslversion.tex b/doc/userman/eacslversion.tex
new file mode 100644
index 0000000000000000000000000000000000000000..921e0d99cef3b2c72913f553471f5ec89617206e
--- /dev/null
+++ b/doc/userman/eacslversion.tex
@@ -0,0 +1,2 @@
+\newcommand{\eacslversion}{Chlorine-20180501+dev\xspace}
+\newcommand{\fcversion}{Chlorine\xspace}
diff --git a/doc/userman/fclangversion.tex b/doc/userman/fclangversion.tex
index 67275e01473cf88945e1ea40a0ff787bfb06c503..96766b114812712ed90d80febcb80193a169bfad 100644
--- a/doc/userman/fclangversion.tex
+++ b/doc/userman/fclangversion.tex
@@ -1,2 +1,2 @@
-\newcommand{\fclangversion}{Chlorine+\xspace}
+\newcommand{\fclangversion}{DRAFT+\xspace}
 \newcommand{\fcversion}{Potassium+\xspace}