diff --git a/lam/lib/modules.inc b/lam/lib/modules.inc
new file mode 100644
index 00000000..c3aa6b92
--- /dev/null
+++ b/lam/lib/modules.inc
@@ -0,0 +1,120 @@
+<?php
+/*
+$Id$
+
+  This code is part of LDAP Account Manager (http://www.sourceforge.net/projects/lam)
+  Copyright (C) 2003-04  Roland Gruber
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+
+	Interface between modules and other parts of LAM.
+
+*/
+
+// returns an hash array (module => options) describing the options for an user profile
+// the options follow the format specified in modules.spec (TODO filename)
+function getUserProfileOptions() {
+	return array();
+}
+
+// returns an hash array (module => options) describing the options for an group profile
+// the options follow the format specified in modules.spec (TODO filename)
+function getGroupProfileOptions() {
+	return array();
+}
+
+// returns an hash array (module => options) describing the options for an host profile
+// the options follow the format specified in modules.spec (TODO filename)
+function getHostProfileOptions() {
+	return array();
+}
+
+// checks if the user profile values are correct
+// $options is a hash array (attribute => value) with the entered values
+// the values are all arrays with one or more elements
+// returns an hash array containing the error messages, if any
+// format of hash: attribute => array(message type, message header, message body, replacement array)
+function checkUserProfileOptions($options) {
+}
+
+// checks if the group profile values are correct
+// $options is a hash array (attribute => value) with the entered values
+// the values are all arrays with one or more elements
+// returns an hash array containing the error messages, if any
+// format of hash: attribute => array(message type, message header, message body, replacement array)
+function checkGroupProfileOptions($options) {
+}
+
+// checks if the host profile values are correct
+// $options is a hash array (attribute => value) with the entered values
+// the values are all arrays with one or more elements
+// returns an hash array containing the error messages, if any
+// format of hash: attribute => array(message type, message header, message body, replacement array)
+function checkHostProfileOptions($options) {
+}
+
+// returns the alias name of a module
+function getModuleAlias($name) {
+	return $name;
+}
+
+// returns a hash array (module name => dependencies) of all user module dependencies
+// dependencies contains an array with two sub arrays: depends, conflicts
+// the elements of depends/conflicts are either module names or an array of module names (OR-case)
+function getUserModuleDependencies() {
+	return array("um1" => array("depends" => "um4"),
+		"um2" => array("depends" => "um4", "conflicts" => "um1"),
+		"um3" => array("conflicts" => "um1"),
+		"um4" => array());
+}
+
+// returns a hash array (module name => dependencies) of all group module dependencies
+// dependencies contains an array with two sub arrays: depends, conflicts
+// the elements of depends/conflicts are either module names or an array of module names (OR-case)
+function getGroupModuleDependencies() {
+	return array("gm1" => array("depends" => "gm4"),
+		"gm2" => array("depends" => "gm4", "conflicts" => "gm1"),
+		"gm3" => array("conflicts" => "gm1"),
+		"gm4" => array());
+}
+
+// returns a hash array (module name => dependencies) of all host module dependencies
+// dependencies contains an array with two sub arrays: depends, conflicts
+// the elements of depends/conflicts are either module names or an array of module names (OR-case)
+function getHostModuleDependencies() {
+	return array("hm1" => array("depends" => "hm4"),
+		"hm2" => array("depends" => "hm4", "conflicts" => "hm1"),
+		"hm3" => array("conflicts" => "hm1"),
+		"hm4" => array());
+}
+
+// returns an array with all available user module names
+function getAvailableUserModules() {
+	return array("um1", "um2", "um3", "um4");
+}
+
+// returns an array with all available group module names
+function getAvailableGroupModules() {
+	return array("gm1", "gm2", "gm3", "gm4");
+}
+
+// returns an array with all available host module names
+function getAvailableHostModules() {
+	return array("hm1", "hm2", "hm3", "hm4");
+}
+
+
+?>