diff --git a/format.js b/format.js
index e7ce2fa..aff92c1 100644
--- a/format.js
+++ b/format.js
@@ -1,173 +1,173 @@
-/**********************************************************************
-* 
-* This module describes the diff format and provides basic verification.
-*
-* XXX EXPERIMENTAL...
-*
-*
-**********************************************************************/
-((typeof define)[0]=='u'?function(f){module.exports=f(require)}:define)
-(function(require){ var module={} // make module AMD/node compatible...
-/*********************************************************************/
-
-var diff = require('./diff')
-var {
-	ANY,
-	BOOL, NUMBER, STRING, ARRAY, FUNCTION,
-	OR, AND, NOT,
-	AT, OF, IN,
-
-	EMPTY, NONE,
-} = diff
-
-
-
-/*********************************************************************/
-//
-// 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...
-
-var VALUE =
-module.VALUE = OR(
-	// XXX use these taken from .placeholders...
-	EMPTY,
-	NONE,
-	ANY)
-
-
-var SIDE_VALUES =
-module.SIDE_VALUES = OR(
-	// A and B...
-	AND(
-		AT('A', VALUE),
-		AT('B', VALUE)),
-	// only A...
-	AT('A', VALUE),
-	// only B...
-	AT('B', VALUE))
-
-var CHANGE =
-module.CHANGE = AND(
-	AT('path', ARRAY),
-	// XXX optional...
-	// 		...see DIFF_OBJECT's options for description...
-	AT('type', OR(STRING, undefined)),
-	SIDE_VALUES)
-
-
-var DIFF_FLAT =
-module.DIFF_FLAT = OR(
-	ARRAY(CHANGE), 
-	null)
-
-
-//---------------------------------------------------------------------
-// Tree diff...
-
-var BASIC_CHANGE =
-module.BASIC_CHANGE = AND(
-	AT('type', 'Basic'),
-	SIDE_VALUES)
-
-
-// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
-var OBJECT_ITEM =
-module.OBJECT_ITEM = OR(
-	[STRING, DIFF_TREE],
-	[STRING, STRING, DIFF_TREE])
-
-var OBJECT_CHANGE =
-module.OBJECT_CHANGE = AND(
-	AT('type', 'Object'),
-	AT('items', ARRAY(OBJECT_ITEM)),
-	// XXX
-	AT('item_order', undefined))
-
-
-// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
-var ARRAY_ITEM =
-module.ARRAY_ITEM = OR(
-	[ANY, ANY, DIFF_TREE],
-	[[ANY, NUMBER], [ANY, NUMBER], DIFF_TREE])
-
-var ARRAY_ITEMS =
-module.ARRAY_ITEMS = AND(
-	AT('length', OR(
-		[NUMBER, NUMBER], 
-		undefined)),
-	AT('items', ARRAY(
-		OR(
-			ARRAY_ITEM,
-			OBJECT_ITEM))),
-	// XXX
-	AT('item_order', undefined))
-
-var ARRAY_CHANGE =
-module.ARRAY_CHANGE = AND(
-		AT('type', 'Array'),
-		ARRAY_ITEMS)
-
-
-// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
-var TEXT_CHANGE =
-module.TEXT_CHANGE = AND(
-		AT('type', 'Text'),
-		ARRAY_ITEMS)
-
-// XXX it makes sense to make this a recursive pattern...
-// 		...need to check if we stop on a recursive pattern...
-// XXX TEST!!!
-var DIFF_TREE =
-module.DIFF_TREE = OR(
-	BASIC_CHANGE,
-	OBJECT_CHANGE,
-	ARRAY_CHANGE,
-	TEXT_CHANGE,
-	null)
-
-
-//---------------------------------------------------------------------
-// Diff...
-
-var DIFF_OBJECT =
-module.DIFF_OBJECT = AND(
-	// format metadata...
-	AT('format', diff.FORMAT_NAME),
-	//AT('version', STRING(/\d+\.\d+\.\d+/)),
-	AT('version', diff.FORMAT_VERSION),
-
-	// instance metadata...
-	AT('options', AND(
- 		AT('tree_diff', OR(BOOL, null)),
- 		AT('keep_none', OR(BOOL, null)),
- 		AT('min_text_length', OR(NUMBER, null)),
-		AT('no_attributes', OR(BOOL, null)),
- 		AT('NONE', OR(ANY, null)),
- 		AT('EMPTY', OR(ANY, null)),
- 		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', ANY),
-		AT('EMPTY', ANY))),
-	AT('timestamp', NUMBER),
-
-	// diff...
-	OR(
-		AND(
-			AT('structure', 'flat'),
-			AT('diff', DIFF_FLAT)), 
-		AND(
-			AT('structure', 'tree'),
-			AT('diff', DIFF_TREE))))
-
-
-
-/**********************************************************************
-* vim:set ts=4 sw=4 :                               */ return module })
+/**********************************************************************
+* 
+* This module describes the diff format and provides basic verification.
+*
+* XXX EXPERIMENTAL...
+*
+*
+**********************************************************************/
+((typeof define)[0]=='u'?function(f){module.exports=f(require)}:define)
+(function(require){ var module={} // make module AMD/node compatible...
+/*********************************************************************/
+
+var diff = require('./diff')
+var {
+	ANY,
+	BOOL, NUMBER, STRING, ARRAY, FUNCTION,
+	OR, AND, NOT,
+	AT, OF, IN,
+
+	EMPTY, NONE,
+} = diff
+
+
+
+/*********************************************************************/
+//
+// 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...
+
+var VALUE =
+module.VALUE = OR(
+	// XXX use these taken from .placeholders...
+	EMPTY,
+	NONE,
+	ANY)
+
+
+var SIDE_VALUES =
+module.SIDE_VALUES = OR(
+	// A and B...
+	AND(
+		AT('A', VALUE),
+		AT('B', VALUE)),
+	// only A...
+	AT('A', VALUE),
+	// only B...
+	AT('B', VALUE))
+
+var CHANGE =
+module.CHANGE = AND(
+	AT('path', ARRAY),
+	// XXX optional...
+	// 		...see DIFF_OBJECT's options for description...
+	AT('type', OR(STRING, undefined)),
+	SIDE_VALUES)
+
+
+var DIFF_FLAT =
+module.DIFF_FLAT = OR(
+	ARRAY(CHANGE), 
+	null)
+
+
+//---------------------------------------------------------------------
+// Tree diff...
+
+var BASIC_CHANGE =
+module.BASIC_CHANGE = AND(
+	AT('type', 'Basic'),
+	SIDE_VALUES)
+
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
+var OBJECT_ITEM =
+module.OBJECT_ITEM = OR(
+	[STRING, DIFF_TREE],
+	[STRING, STRING, DIFF_TREE])
+
+var OBJECT_CHANGE =
+module.OBJECT_CHANGE = AND(
+	AT('type', 'Object'),
+	AT('items', ARRAY(OBJECT_ITEM)),
+	// XXX
+	AT('item_order', undefined))
+
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
+var ARRAY_ITEM =
+module.ARRAY_ITEM = OR(
+	[ANY, ANY, DIFF_TREE],
+	[[ANY, NUMBER], [ANY, NUMBER], DIFF_TREE])
+
+var ARRAY_ITEMS =
+module.ARRAY_ITEMS = AND(
+	AT('length', OR(
+		[NUMBER, NUMBER], 
+		undefined)),
+	AT('items', ARRAY(
+		OR(
+			ARRAY_ITEM,
+			OBJECT_ITEM))),
+	// XXX
+	AT('item_order', undefined))
+
+var ARRAY_CHANGE =
+module.ARRAY_CHANGE = AND(
+		AT('type', 'Array'),
+		ARRAY_ITEMS)
+
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
+var TEXT_CHANGE =
+module.TEXT_CHANGE = AND(
+		AT('type', 'Text'),
+		ARRAY_ITEMS)
+
+// XXX it makes sense to make this a recursive pattern...
+// 		...need to check if we stop on a recursive pattern...
+// XXX TEST!!!
+var DIFF_TREE =
+module.DIFF_TREE = OR(
+	BASIC_CHANGE,
+	OBJECT_CHANGE,
+	ARRAY_CHANGE,
+	TEXT_CHANGE,
+	null)
+
+
+//---------------------------------------------------------------------
+// Diff...
+
+var DIFF_OBJECT =
+module.DIFF_OBJECT = AND(
+	// format metadata...
+	AT('format', diff.FORMAT_NAME),
+	//AT('version', STRING(/\d+\.\d+\.\d+/)),
+	AT('version', diff.FORMAT_VERSION),
+
+	// instance metadata...
+	AT('options', AND(
+ 		AT('tree_diff', OR(BOOL, null)),
+ 		AT('keep_none', OR(BOOL, null)),
+ 		AT('min_text_length', OR(NUMBER, null)),
+		AT('no_attributes', OR(BOOL, null)),
+ 		AT('NONE', OR(ANY, null)),
+ 		AT('EMPTY', OR(ANY, null)),
+ 		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', ANY),
+		AT('EMPTY', ANY))),
+	AT('timestamp', NUMBER),
+
+	// diff...
+	OR(
+		AND(
+			AT('structure', 'flat'),
+			AT('diff', DIFF_FLAT)), 
+		AND(
+			AT('structure', 'tree'),
+			AT('diff', DIFF_TREE))))
+
+
+
+/**********************************************************************
+* vim:set ts=4 sw=4 :                               */ return module })