diff --git a/diff.js b/diff.js
index 50936dc..e435c8e 100644
--- a/diff.js
+++ b/diff.js
@@ -29,6 +29,7 @@ var MIN_TEXT_LENGTH = 100
 //		- revise architecture...
 //			- merge Types and Diff
 //			- cmp(..) / diff(..) / patch(..) to use Diff(..)
+//
 //		- revise name -- this contains two parts:
 //			1. diff / patch and friends
 //			2. cmp and patterns
@@ -36,29 +37,19 @@ var MIN_TEXT_LENGTH = 100
 //				ig-diff
 //				cdiff
 //				pattern diff
-//
 //		  we need the name to be short and descriptive, possible 
 //		  candidates:
 //		  	- objdiff / object-diff
 //		  	- diffcmp / diff-cmp
 //		  	- compare
+//
 //		- revise docs...
 //			...should be simpler to enter, maybe example-oriented intro
+//
 //		- diff visualization -- for example see:
 //			https://www.npmjs.com/package/jsondiffpatch
-//		- experiment with pattern contexts...
-//			a context is essentially a namespace for a pattern within a 
-//			specific use instance.
-//			this would enable us to create a settable/linkable named 
-//			pattern that would:
-//				- until first successful match use pattern to compare
-//				- set on first successful match
-//				- subsequent matches would compare to the set value
 //
-//			NAMED(<name>[, pattern])
-//
-//			this would also require a means to pass the context to 
-//			nested patterns and to access it...
+//		- diff compatibility checking...
 //
 //
 //
@@ -71,7 +62,6 @@ var MIN_TEXT_LENGTH = 100
 // 	zip(func, array, array, ...)
 // 		-> [func(i, [item, item, ...]), ...]
 //
-// XXX revise -- is this too complicated???
 var zip = function(func, ...arrays){
 	var i = arrays[0] instanceof Array ? 0 : arrays.shift()
 	if(func instanceof Array){
@@ -2543,5 +2533,6 @@ function(pattern, obj){
 
 
 
+
 /**********************************************************************
 * vim:set ts=4 sw=4 :                               */ return module })
diff --git a/format.js b/format.js
index fb7456d..109cca8 100644
--- a/format.js
+++ b/format.js
@@ -27,8 +27,7 @@ var {
 //
 // XXX need better mismatch checking -- ideally stating the exact spot
 // 		where we did not match and the path of fails it created...
-// XXX idea: would be nice to be able to use patterns to extract values
-// 		from structures (parsing)...
+//
 //
 //---------------------------------------------------------------------
 // Flat diff...
@@ -153,8 +152,6 @@ module.DIFF_OBJECT = AND(
  		AT('no_length', OR(BOOL, NULL)),
  		AT('cmp', OR(FUNCTION, NULL)) )),
 	AT('placeholders', AND(
-		// XXX would be nice to store these and to use them to test 
-		// 		deeper stuff (i.e. VALUE)...
 		AT('NONE', 
 			VAR('NONE', ANY)),
 		AT('EMPTY',