diff --git a/conf/modules/demo_module.xml b/conf/modules/demo_module.xml
new file mode 100644
index 0000000000..f09d016796
--- /dev/null
+++ b/conf/modules/demo_module.xml
@@ -0,0 +1,15 @@
+<!DOCTYPE module SYSTEM "module.dtd">
+
+<module name="demo_module">
+  <header>
+    <file name="demo_module.h"/>
+  </header>
+  <init fun="init_demo()"/>
+  <periodic fun="periodic_1Hz_demo()" period="1." start="start_demo()" stop="stop_demo()"/>
+  <periodic fun="periodic_10Hz_demo()" period="0.1" start="start_demo()" stop="stop_demo()"/>
+  <makefile>
+    <flag name="DEMO_MODULE_LED" value="2"/>
+    <file name="demo_module.c"/>
+  </makefile>
+</module>
+
diff --git a/conf/modules/module.dtd b/conf/modules/module.dtd
new file mode 100644
index 0000000000..7e5fa413df
--- /dev/null
+++ b/conf/modules/module.dtd
@@ -0,0 +1,49 @@
+<!-- Paparazzi Modules DTD -->
+
+<!ELEMENT module (depend?,header,init?,periodic*,event*,makefile*)>
+<!ELEMENT depend EMPTY>
+<!ELEMENT header (file*)>
+<!ELEMENT init EMPTY>
+<!ELEMENT periodic EMPTY>
+<!ELEMENT event (handler*)>
+<!ELEMENT handler EMPTY>
+<!ELEMENT makefile (flag*,file*)>
+<!ELEMENT flag EMPTY>
+<!ELEMENT file EMPTY>
+
+<!ATTLIST module
+name CDATA #REQUIRED>
+
+<!ATTLIST depend
+require CDATA #IMPLIED
+conflict CDATA #IMPLIED>
+
+<!ATTLIST header>
+
+<!ATTLIST init
+fun CDATA #REQUIRED>
+
+<!ATTLIST periodic
+fun CDATA #REQUIRED
+period CDATA #REQUIRED
+delay CDATA #IMPLIED
+start CDATA #IMPLIED
+stop CDATA #IMPLIED
+autorun (TRUE|FALSE) #IMPLIED >
+
+<!ATTLIST event
+fun CDATA #REQUIRED>
+
+<!ATTLIST handler
+fun CDATA #REQUIRED>
+
+<!ATTLIST makefile
+target CDATA "ap|sim">
+
+<!ATTLIST flag
+name CDATA #REQUIRED
+value CDATA #IMPLIED>
+
+<!ATTLIST file
+name CDATA #REQUIRED>
+