diff --git a/html/inc/bolt.inc b/html/inc/bolt.inc
index 5c0ba3019a..68324de8cf 100644
--- a/html/inc/bolt.inc
+++ b/html/inc/bolt.inc
@@ -30,6 +30,7 @@ abstract class BoltUnit {
     public $title;
         // Optional; used when showing course history outline.
     public $is_item;
+	public $attrs;		// course-defined
 
     abstract function walk(&$iter, $incr, &$frac_done);
         // multi-purpose function for traversing a course.
@@ -47,7 +48,7 @@ abstract class BoltUnit {
 class BoltItem extends BoltUnit {
     public $filename;
     public $query_string;
-    function __construct($filename, $title) {
+    function __construct($filename, $title, $attrs) {
         $p = strpos($filename, '?');
         if ($p === false) {
             $this->filename = $filename;
@@ -59,6 +60,7 @@ class BoltItem extends BoltUnit {
         $this->name = $filename;
         $this->title = $title;
         $this->is_item = true;
+		$this->attrs = $attrs;
     }
     function begin() {
         return array(new BoltFrame($this));
@@ -108,12 +110,13 @@ class BoltExercise extends BoltItem {
 //
 class BoltSet extends BoltUnit {
     public $units;
-    function __construct($name, $units, $ntoshow) {
+    function __construct($name, $units, $ntoshow, $attrs) {
         $this->name = $name;
         $this->is_item = false;
         $this->units = $units;
         $this->ntoshow = $ntoshow;
         $this->ordered = false;
+		$this->attrs = $attrs;
     }
 
     // restart this unit - set its state record to an initial state
@@ -252,6 +255,10 @@ function filename($n) {
     return array('filename', $n);
 }
 
+function attrs($n) {
+    return array('attrs', $n);
+}
+
 function callback($n) {
     return array('callback', $n);
 }
@@ -259,12 +266,15 @@ function callback($n) {
 function lesson() {
     $filename = "";
     $title = "";
+	$attrs = null;
+
     $args = func_get_args();
     foreach ($args as $arg) {
         if (is_array($arg)) {
             switch ($arg[0]) {
             case 'title': $title = $arg[1]; break;
             case 'filename': $filename = $arg[1]; break;
+            case 'attrs': $attrs = $arg[1]; break;
             default: echo "Unrecognized lesson parameter: ", $arg[0], "\n"; break;
             }
         } else {
@@ -277,12 +287,14 @@ function lesson() {
     if (!$filename) {
         error_page("Missing filename in lesson");
     }
-    return new BoltLesson($filename, $title);
+    return new BoltLesson($filename, $title, $attrs);
 }
 
 function exercise() {
     $filename = "";
     $title = "";
+	$attrs = null;
+
     $args = func_get_args();
     $callback = null;
     foreach ($args as $arg) {
@@ -290,6 +302,7 @@ function exercise() {
             switch ($arg[0]) {
             case 'title': $title = $arg[1]; break;
             case 'filename': $filename = $arg[1]; break;
+            case 'attrs': $attrs = $arg[1]; break;
             case 'callback': $callback = $arg[1]; break;
             default: echo "Unrecognized exercise parameter: ", $arg[0], "\n"; break;
             }
@@ -301,7 +314,7 @@ function exercise() {
     if (!$filename) {
         error_page("Missing filename in lesson");
     }
-    return new BoltExercise($filename, $title, $callback);
+    return new BoltExercise($filename, $title, $attrs, $callback);
 }
 
 require_once('../inc/bolt_seq.inc');
diff --git a/html/inc/bolt_rnd.inc b/html/inc/bolt_rnd.inc
index 35bd7c030d..07583af2f9 100644
--- a/html/inc/bolt_rnd.inc
+++ b/html/inc/bolt_rnd.inc
@@ -18,8 +18,8 @@
 
 class BoltRandom extends BoltSet {
     public $units;
-    function __construct($name, $units, $number) {
-        parent::__construct($name, $units, $number);
+    function __construct($name, $units, $number, $attrs) {
+        parent::__construct($name, $units, $number, $attrs);
     }
 
     function order(&$iter) {
@@ -49,12 +49,14 @@ function random() {
     $units = array();
     $name = "";
     $number = 0;
+	$attrs = null;
     foreach ($args as $arg) {
         if (is_array($arg)) {
             switch ($arg[0]) {
             case 'name': $name = $arg[1]; break;
             case 'title': $title = $arg[1]; break;
             case 'number': $number = $arg[1]; break;
+            case 'attrs': $attrs = $arg[1]; break;
             default: echo "Unrecognized array arg: ", $arg[0], "\n"; break;
             }
         } else if (is_object($arg)) {
@@ -67,7 +69,7 @@ function random() {
         }
     }
     if ($number == 0) $number = count($units);
-    return new BoltRandom($name, $units, $number);
+    return new BoltRandom($name, $units, $number, $attrs);
 }
 
 ?>
diff --git a/html/inc/bolt_select.inc b/html/inc/bolt_select.inc
index 5e982ba9fe..29f4d5f0b4 100644
--- a/html/inc/bolt_select.inc
+++ b/html/inc/bolt_select.inc
@@ -24,9 +24,9 @@ function select_cmp($a, $b) {
 class BoltSelect extends BoltSet {
     public $valuator;
 
-    function __construct($name, $units, $valuator) {
+    function __construct($name, $units, $valuator, $attrs) {
         $this->valuator = $valuator;
-        parent::__construct($name, $units, 1);
+        parent::__construct($name, $units, 1, $attrs);
     }
 
     function order() {
@@ -60,12 +60,14 @@ function select() {
     $args = func_get_args();
     $units = array();
     $name = "";
+	$attrs = null;
     foreach ($args as $arg) {
         if (is_array($arg)) {
             switch ($arg[0]) {
             case 'name': $name = $arg[1]; break;
             case 'title': $title = $arg[1]; break;
             case 'valuator': $valuator = $arg[1]; break;
+            case 'attrs': $attrs = $arg[1]; break;
             default: echo "Unrecognized array arg: ", $arg[0], "\n"; break;
             }
         } else if (is_object($arg)) {
@@ -80,7 +82,7 @@ function select() {
     if (!$valuator) {
         error_page("missing valuator");
     }
-    return new BoltSelect($name, $units, $valuator);
+    return new BoltSelect($name, $units, $valuator, $attrs);
 }
 
 ?>
diff --git a/html/inc/bolt_seq.inc b/html/inc/bolt_seq.inc
index 0707d8e879..b712535613 100644
--- a/html/inc/bolt_seq.inc
+++ b/html/inc/bolt_seq.inc
@@ -17,8 +17,8 @@
 // along with BOINC.  If not, see <http://www.gnu.org/licenses/>.
 
 class BoltSequence extends BoltSet {
-    function __construct($name, $units) {
-        parent::__construct($name, $units, count($units));
+    function __construct($name, $units, $attrs) {
+        parent::__construct($name, $units, count($units), $attrs);
     }
 
     function order() {
@@ -39,11 +39,13 @@ function sequence() {
     $args = func_get_args();
     $units = array();
     $name = "";
+	$attrs = null;
     foreach ($args as $arg) {
         if (is_array($arg)) {
             switch ($arg[0]) {
             case 'name': $name = $arg[1]; break;
             case 'title': $title = $arg[1]; break;
+            case 'attrs': $attrs = $arg[1]; break;
             default: echo "Unrecognized array arg: ", $arg[0], "\n"; break;
             }
         } else if (is_object($arg)) {
@@ -55,7 +57,7 @@ function sequence() {
             }
         }
     }
-    return new BoltSequence($name, $units);
+    return new BoltSequence($name, $units, $attrs);
 }
 
 ?>
diff --git a/html/inc/bolt_xset.inc b/html/inc/bolt_xset.inc
index 6cebd13fa1..cfb0fa8e75 100644
--- a/html/inc/bolt_xset.inc
+++ b/html/inc/bolt_xset.inc
@@ -20,10 +20,12 @@ class BoltExerciseSet extends BoltRandom {
     public $repeats;
     public $refresh;
     public $callback;
+
     function __construct(
-        $name, $units, $number, $repeats, $refresh, $callback
+        $name, $units, $number, $repeats, $refresh, $attrs, $callback
     ) {
-        parent::__construct($name, $units, $number);
+        parent::__construct($name, $units, $number, $attrs);
+
         $this->repeats = $repeats;
         $this->refresh = $refresh;
         $this->callback = $callback;
@@ -168,12 +170,14 @@ function exercise_set() {
     $callback = null;
     $name = "";
     $number = 0;
+	$attrs = null;
     foreach ($args as $arg) {
         if (is_array($arg)) {
             switch ($arg[0]) {
             case 'name': $name = $arg[1]; break;
             case 'title': $title = $arg[1]; break;
             case 'number': $number = $arg[1]; break;
+            case 'attrs': $attrs = $arg[1]; break;
             case 'callback': $callback = $arg[1]; break;
             default: echo "Unrecognized array arg: ", $arg[0], "\n"; break;
             }
@@ -191,9 +195,10 @@ function exercise_set() {
             echo "Unexpected arg to exercise_set(): "; print_r($arg);
         }
     }
+
     if ($number == 0) $number = count($units);
     return new BoltExerciseSet(
-        $name, $units, $number, $repeats, $refresh, $callback
+        $name, $units, $number, $repeats, $refresh, $attrs, $callback
     );
 }