diff --git a/ui (gen4)/imagegrid/tags.js b/ui (gen4)/imagegrid/tags.js
index 97c44b65..38d7b7ab 100755
--- a/ui (gen4)/imagegrid/tags.js	
+++ b/ui (gen4)/imagegrid/tags.js	
@@ -11,10 +11,16 @@
 * 		a/b/c
 * 	- tag sets/relations
 * 		a:b
-* 	- serializable tag queries
+* 	- serializable tag queries (text/json)
 * 	- serializable tag data
 *
 *
+* TODO:
+* 	- investigate support for sqlite3
+* 		- is it faster?
+*
+*
+*
 **********************************************************************/
 ((typeof define)[0]=='u'?function(f){module.exports=f(require)}:define)
 (function(require){ var module={} // make module AMD/node compatible...
@@ -25,29 +31,6 @@ var util = require('lib/util')
 
 
 
-/*********************************************************************/
-
-// XXX a Set-like back-end...
-// 		API:
-// 			.has(..)
-// 				-> bool
-//
-// 			Unite two sets...
-// 			.unite(..)
-// 				-> new
-//
-// 			Intersection of two sets...
-// 			.intersect(..)
-// 				-> new
-//
-// 			Difference of two sets...
-// 			.subtract(..)
-// 				-> new
-
-// extend Set to support the needed basics...
-
-
-
 /*********************************************************************/
 
 var TagsClassPrototype = {