Content improvements
diff --git a/org.eclipse.rmf.documentation/rmf-latex/overview.tex b/org.eclipse.rmf.documentation/rmf-latex/overview.tex
index 91c9b9d..7007d64 100644
--- a/org.eclipse.rmf.documentation/rmf-latex/overview.tex
+++ b/org.eclipse.rmf.documentation/rmf-latex/overview.tex
@@ -200,6 +200,8 @@
Last, there are seven \term{DatatypeDefinitions}, some of which can be customized further.
\begin{definition}{DatatypeDefinition}
+\index{DatatypeDefinition}
+\index{XHTML}
DatatypeDefinitions are the fundamental types in ReqIF and include:
\begin{itemize}
\item Boolean
diff --git a/org.eclipse.rmf.documentation/rmf-latex/reference.tex b/org.eclipse.rmf.documentation/rmf-latex/reference.tex
index 97ed58b..b7abe30 100644
--- a/org.eclipse.rmf.documentation/rmf-latex/reference.tex
+++ b/org.eclipse.rmf.documentation/rmf-latex/reference.tex
@@ -279,6 +279,7 @@
\end{description}
\begin{info}
+\index{XHTML}
Particular popular is the free Presentation from formalmind Essentials for handling XHTML. The standard editor from ProR converts rich text to plain text. The rich text Presentation is preinstalled with formalmind Studio.
\end{info}
