diff --git a/lib/groups/GroupUnitLink.inc b/lib/groups/GroupUnitLink.inc
new file mode 100644
index 0000000..1ec1051
--- /dev/null
+++ b/lib/groups/GroupUnitLink.inc
@@ -0,0 +1,198 @@
+<?php
+/**
+* @package lib.groups
+*
+* Class GroupUnitLink
+* Represents a group, unit link as per the database table groups_units_link
+*
+* @author Rob Cherry, Jam Warehouse (Pty) Ltd, South Africa
+* @date 20 January 2003
+*/
+
+class GroupUnitLink {
+	
+	/** primary key of object */
+	var $iId;
+	/** primary key of group to which unit is linked */
+	var $iGroupID; 
+	/** primary key of unit to which group is linked */
+	var $iUnitID;
+	
+	function GroupUnitLink($iNewGroupID, $iNewUnitID) {
+		//object not created in database yet
+		$this->iId = -1;
+		$this->iGroupID = $iNewGroupID;
+		$this->iUnitID = $iNewUnitID;
+	}
+	
+	/**
+	* Get the object's primary key
+	*
+	* @return int object's primary key
+	*
+	*/
+	function getID() {
+		return $this->iId;
+	}
+	
+	/**
+	* Get the primary key of the group to which the unit is linked
+	*
+	* @return int primary key of group to which unit is linked
+	*
+	*/
+	function getGroupID() {
+		return $this->iGroupID;
+	}
+	
+	/**
+	* Set the primary key of the group to which the unit is linked
+	*
+	* @param 	int		Primary key of group to which unit is ilinked
+	*
+	*/
+	function setGroupID($iNewValue) {
+		$this->iGroupID = $iNewValue;
+	}
+	
+	/**
+	* Get the prijmary key of the unit to which the group is linked
+	*
+	* @return int primary key of unit to which the group is linked
+	*
+	*/
+	function getUnitID() {
+		return $this->iUnitID;
+	}
+	
+	/**
+	* Set the primary key of the unit to which the group is linked
+	*
+	* @param 	int		Primary key of unit to which the group is linked
+	*
+	*/
+	function setUnitID($iNewValue) {
+		$this->iUnitID = $iNewValue;
+	}
+	
+	/**
+	* Create the current object in the database
+	*
+	* @return boolean on successful store, false otherwise and set $_SESSION["errorMessage"]
+	*
+	*/
+	function create() {
+		global $default, $lang_err_database, $lang_err_object_exists;
+		//if the object hasn't been created
+		if ($this->iId < 0) {
+			$sql = new Owl_DB();
+			$result = $sql->query("INSERT INTO " . $default->owl_groups_units_table . " (group_id, unit_id) VALUES ($this->iGroupID, $this->iUnitID)");
+			if ($result) {
+				$this->iId = $sql->insert_id();
+				return  true;
+			}
+			$_SESSION["errorMessage"] = $lang_err_database;
+			return false;
+		}
+		$_SESSION["errorMessage"] = $lang_err_object_exists . "id = " . $this->iId . " table = $default->owl_groups_units_table";
+		return false;
+	}
+	
+	/**
+	* Update the values in the database table with the object's current values
+	*
+	* @return boolean true on successful update, false otherwise and set $_SESSION["errorMessage"]
+	*
+	*/
+	function update() {
+		global $default, $lang_err_database, $lang_err_object_key;
+		//only update if the object has been stored
+		if ($this->iId > 0) {
+			$sql = new Owl_DB();
+			$result = $sql->query("UPDATE " . $default->owl_groups_units_table . " SET group_id = $this->iGroupID, unit_id = $this->iUnitID WHERE id = $this->iId");
+			if ($result) {
+				return true;
+			}
+			$_SESSION["errorMessage"] = $lang_err_database;
+			return false;
+		}
+		$_SESSION["errorMessage"] = $lang_err_object_key;
+		return false;
+	}
+	
+	/**
+	* Delete the current object from the database
+	*
+	* @return boolean true on successful deletion, false otherwise and set $_SESSION["errorMessage"]
+	*
+	*/
+	function delete() {
+		global $default, $lang_err_database, $lang_err_object_key;
+		//only delete the object if it exists in the database
+		if ($this->iId >= 0) {
+			$sql = new Owl_DB();
+			$result = $sql->query("DELETE FROM $default->owl_groups_units_table WHERE id = $this->iId");
+			if ($result) {
+				return true;
+			}
+			$_SESSION["errorMessage"] = $lang_err_database;
+			return false;
+		}
+		$_SESSION["errorMessage"] = $lang_err_object_key;
+		return false;
+	}
+	
+	/**
+	* Static function.
+	* Given a groups_units_link primary key it will create a 
+	* GroupUnitsLink object and populate it with the 
+	* corresponding database values
+	*
+	* @return GroupUnitsLink populated GroupUnitsLink object on successful query, false otherwise and set $_SESSION["errorMessage"]
+	*/
+	function & get($iGroupUnitLinkID) {
+		global $default;
+		$sql = new Owl_DB();
+		$result = $sql->query("SELECT * FROM $default->owl_groups_units_table WHERE id = $iGroupUnitLinkID");
+		if ($result) {
+			if ($sql->next_record()) {
+				$oGroupUnitLink = & new GroupUnitLink($sql->f("group_id"), $sql->f("unit_id"));
+				$oGroupUnitLink->iId = $iGroupUnitLinkID;
+				return $oGroupUnitLink;
+			}
+			$_SESSION["errorMessage"] = $lang_err_object_not_exist . "id = " . $iGroupUnitLinkID . " table = $default->owl_groups_units_table";
+			return false;
+		}
+		$_SESSION["errorMessage"] = $lang_err_database;
+		return false;
+	}
+
+/**
+	* Static function
+	* Get a list of web documents
+	*
+	* @param 	String		Where clause (not required)
+	*
+	* @return Array array of GroupUnitLink objects, false otherwise and set $_SESSION["errorMessage"]
+	*/
+	function getList($sWhereClause = null) {
+		global $default, $lang_err_database;
+		$aGroupUnitLink;
+		settype($aGroupUnitLink, "array");
+		$sql = new Owl_DB();
+		$result = $sql->query("SELECT * FROM " . $default->owl_groups_units_table  . (isset($sWhereClause) ? " " . $sWhereClause : ""));
+		if ($result) {			
+			$iCount = 0;
+			while ($sql->next_record()) {
+				$oGroupUnitLink = & GroupUnitLink::get($sql->f("id"));
+				$aGroupUnitLink[$iCount] = $oGroupUnitLink;
+				$iCount++;
+			}
+			return $aGroupUnitLink;
+		}
+		$_SESSION["errorMessage"] = $lang_err_database;
+		return false;
+	}
+	
+}
+?>