diff --git a/src/insets/ChangeLog b/src/insets/ChangeLog
index 5150c6634f..117d1d6069 100644
--- a/src/insets/ChangeLog
+++ b/src/insets/ChangeLog
@@ -1,3 +1,7 @@
+2005-11-10  Jürgen Spitzmüller  <j.spitzmueller@gmx.de>
+
+	* insetbase.h: document the EDITABLE enum.
+
 2005-11-07  Jürgen Spitzmüller  <j.spitzmueller@gmx.de>
 
 	* insetert.C (setButtonLabel): use isOpen() to test whether the ert
diff --git a/src/insets/insetbase.h b/src/insets/insetbase.h
index 56ba494099..07d37dd2d8 100644
--- a/src/insets/insetbase.h
+++ b/src/insets/insetbase.h
@@ -192,7 +192,13 @@ public:
 	virtual int docbook(Buffer const &, std::ostream & os,
 		OutputParams const &) const;
 
-	///
+	/** This enum indicates by which means the inset can be modified:
+	- NOT_EDITABLE: the inset's content can not be modified at all 
+	  (e.g. printindex, insetspecialchar)
+	- IS_EDITABLE: content can be edited via dialog (e.g. bibtex, index, url)
+	- HIGHLY_EDITABLE: content can be edited on screen (normally means that
+	  insettext is contained, e.g. collapsables, tabular) */
+	// FIXME: This has not yet been fully implemented to math insets
 	enum EDITABLE {
 		///
 		NOT_EDITABLE = 0,