-<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook V4.1//EN" [
-<!ENTITY gras-DataDesc SYSTEM "sgml/DataDesc.sgml">
-<!ENTITY gras-Globals SYSTEM "sgml/Globals.sgml">
-<!ENTITY gras-Messages SYSTEM "sgml/Messages.sgml">
-<!ENTITY gras-Socks SYSTEM "sgml/Socks.sgml">
-
-<!ENTITY gras-err SYSTEM "sgml/core_err.sgml">
-<!ENTITY gras-log SYSTEM "sgml/core_log.sgml">
-<!ENTITY gras-dynar SYSTEM "sgml/core_dynar.sgml">
-<!ENTITY gras-dico SYSTEM "sgml/core_dico.sgml">
-<!ENTITY gras-cfg SYSTEM "sgml/core_cfg.sgml">
-
-<!ENTITY gras-gras SYSTEM "sgml/gras.sgml">
-<!ENTITY gras-gras-private SYSTEM "sgml/gras_private.sgml">
-<!ENTITY gras-gras-rl SYSTEM "sgml/gras_rl.sgml">
-<!ENTITY gras-gras-sg SYSTEM "sgml/gras_sg.sgml">
-
-<!ENTITY overview SYSTEM "overview.sgml">
+<?xml version="1.0"?>
+<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
+ "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" [
+
+<!ENTITY comm-socks SYSTEM "xml/comm_socks.xml">
+<!ENTITY comm-datadesc SYSTEM "xml/comm_datadesc.xml">
+<!ENTITY comm-messages SYSTEM "xml/comm_messages.xml">
+
+<!ENTITY virtu-globals SYSTEM "xml/virtu_globals.xml">
+<!ENTITY virtu-syscall SYSTEM "xml/virtu_syscall.xml">
+<!ENTITY virtu-fs SYSTEM "xml/virtu_fs.xml">
+
+
+<!ENTITY xbt-error SYSTEM "xml/xbt_error.xml">
+<!ENTITY xbt-log SYSTEM "xml/xbt_log.xml">
+<!ENTITY xbt-dynar SYSTEM "xml/xbt_dynar.xml">
+<!ENTITY xbt-dict SYSTEM "xml/xbt_dict.xml">
+<!ENTITY xbt-set SYSTEM "xml/xbt_set.xml">
+<!ENTITY xbt-swag SYSTEM "xml/xbt_swag.xml">
+<!ENTITY xbt-heap SYSTEM "xml/xbt_heap.xml">
+<!ENTITY xbt-config SYSTEM "xml/xbt_config.xml">
+
+<!ENTITY surf-maxmin SYSTEM "xml/surf_maxmin.xml">
+
+<!ENTITY gras-gras SYSTEM "xml/gras.xml">
+<!ENTITY gras-gras-private SYSTEM "xml/gras_private.xml">
+<!ENTITY gras-gras-rl SYSTEM "xml/gras_rl.xml">
+<!ENTITY gras-gras-sg SYSTEM "xml/gras_sg.xml">
+
+<!ENTITY overview SYSTEM "overview.xml">
+<!ENTITY faq SYSTEM "faq.xml">