diff --git a/php/classes/DerivedParamMgr.php b/php/classes/DerivedParamMgr.php
index 0608b2b..d4f1e2f 100644
--- a/php/classes/DerivedParamMgr.php
+++ b/php/classes/DerivedParamMgr.php
@@ -30,11 +30,21 @@ class DerivedParamMgr extends AmdaObjectMgr
 			$this->contentRootId = 'myDataParam-treeRootNode';
 			$this->contentRootTag = 'myDataList';
 			//node attributes and object XML tags 
-			$this->attributes = array('name' => '',  'size' => ' ', 'format' => '', 'desc' => '', 'mask' => '', 'plottype' => '');
-			// + tags in object XML
-			$this->optionalAttributes = array('vi' => 'undefined', 'realvar' => '', 'fillvalue' => -1.e31, 'units' => 'undefined',
-						'ytitle' => 'undefined',  'file' => '', 
-						'type' => '', 'size' => '',  'minsampling' => '');
+			$this->attributes = array( 'name' => '',  
+											'size' => ' ', 
+											'format' => '', 
+											'desc' => '', 
+											'mask' => '', 
+											'plottype' => '');
+			$this->optionalAttributes = array('vi' => 'undefined', 
+														'realvar' => '', 
+														'fillvalue' => -1.e31, 
+														'units' => 'undefined',
+														'ytitle' => 'undefined',  
+														'file' => '', 
+														'type' => '', 
+														'size' => '',  
+														'minsampling' => '');
 			$this->objTagName = 'mydata';
 			$this->id_prefix = 'wsd_';
 			$this->type = 'myDataParam';
--
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