--- a/busui/owa/modules/base/classes/calculatedMetric.php
+++ b/busui/owa/modules/base/classes/calculatedMetric.php
@@ -1,1 +1,58 @@
+<?php
 
+//
+// Open Web Analytics - An Open Source Web Analytics Framework
+//
+// Copyright 2006 Peter Adams. All rights reserved.
+//
+// Licensed under GPL v2.0 http://www.gnu.org/copyleft/gpl.html
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// $Id$
+//
+
+/**
+ * Abstract Calculated Metric
+ * 
+ * @author      Peter Adams <peter@openwebanalytics.com>
+ * @copyright   Copyright &copy; 2006 Peter Adams <peter@openwebanalytics.com>
+ * @license     http://www.gnu.org/copyleft/gpl.html GPL v2.0
+ * @category    owa
+ * @package     owa
+ * @version		$Revision$	      
+ * @since		owa 1.3.0
+ */
+
+class owa_calculatedMetric extends owa_metric {
+	
+	var $is_calculated = true;
+	var $child_metrics = array();
+	var $formula;
+	
+	function setChildMetric($name) {
+		
+		$this->child_metrics[] = $name;
+	}
+	
+	function getChildMetrics() {
+		
+		return $this->child_metrics;
+	}	
+	
+	function setFormula($string) {
+		
+		$this->formula = $string;
+	}
+	
+	function getFormula() {
+	
+		return $this->formula;
+	}	
+}
+
+?>