<!ENTITY comm-socks SYSTEM "sgml/comm_socks.sgml">
<!ENTITY comm-datadesc SYSTEM "sgml/comm_datadesc.sgml">
-<!ENTITY comm-dd-expert SYSTEM "sgml/comm_datadesc_expert.sgml">
<!ENTITY comm-messages SYSTEM "sgml/comm_messages.sgml">
<!ENTITY virtu-globals SYSTEM "sgml/virtu_globals.sgml">
<chapter>
<title>Communication facilities</title>
&comm-datadesc;
- &comm-dd-expert;
&comm-socks;
&comm-messages;
</chapter>
=item
Write examples.
--->
</chapter>
+-->
<chapter>
<title>GRAS toolbox</title>