Index: modules/field/field.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/field/field.module,v
retrieving revision 1.92
diff -u -p -r1.92 field.module
--- modules/field/field.module	7 Dec 2010 05:09:58 -0000	1.92
+++ modules/field/field.module	11 Dec 2010 20:23:45 -0000
@@ -79,17 +79,23 @@ require_once DRUPAL_ROOT . '/modules/fie
  * unlimited number of values.
  */
 define('FIELD_CARDINALITY_UNLIMITED', -1);
-
 /**
- * TODO
+ * Value for $field['behaviors']['default value'] property to indicate
+ * that the widget does not support default values.
  */
 define('FIELD_BEHAVIOR_NONE', 0x0001);
 /**
- * TODO
+ * Value for $field['behaviors']['default value'] property to indicate
+ * that the widget accepts default values.
+ * Also a value for $field['behaviors']['multiple values'] property, it
+ * indicates that the widget will be repeated for each value input if
+ * it allows the input of one single field value.
  */
 define('FIELD_BEHAVIOR_DEFAULT', 0x0002);
 /**
- * TODO
+ * Value for $field['behaviors']['multiple values'] property to indicate
+ * that the widget can receive several field values. Examples: checkboxes,
+ * comma-separated textfield.
  */
 define('FIELD_BEHAVIOR_CUSTOM', 0x0004);