diff --git a/ase/include/ase/cmn/map.h b/ase/include/ase/cmn/map.h
index cef84853..b1fae78e 100644
--- a/ase/include/ase/cmn/map.h
+++ b/ase/include/ase/cmn/map.h
@@ -1,5 +1,5 @@
 /*
- * $Id: map.h 373 2008-09-23 11:27:24Z baconevi $
+ * $Id: map.h 375 2008-09-23 14:47:23Z baconevi $
  *
  * {License}
  */
@@ -43,6 +43,21 @@ typedef int (*ase_map_comper_t) (
 	ase_size_t klen2  /* the length of a key in bytes */
 );
 
+/* 
+ * value keeper
+ * it is called when a value can be kept without explicit free and copy 
+ */
+typedef void (*ase_map_keeper_t) (
+	ase_map_t* map,
+	void* dptr,
+	ase_size_t dlen	
+);
+
+/*
+ * bucket resizer
+ */
+typedef ase_size_t (*ase_map_sizer_t) (ase_map_t* data, ase_size_t hint);
+
 /* pair visitor - should return ASE_MAP_WALK_STOP or ASE_MAP_WALK_FORWARD */
 typedef int (*ase_map_walker_t) (
 	ase_map_t* map        /* a map */, 
@@ -68,9 +83,10 @@ struct ase_map_t
 
         ase_map_copier_t copier[2];
         ase_map_freeer_t freeer[2];
-	ase_map_hasher_t hasher;
-	ase_map_comper_t comper;
-	ase_sizer_t sizer;
+	ase_map_hasher_t hasher; /* key hasher */
+	ase_map_comper_t comper; /* key comparator */
+	ase_map_keeper_t keeper; /* value keeper */
+	ase_map_sizer_t  sizer;  /* bucket resizer */
 
 	ase_size_t size;
 	ase_size_t capa;
@@ -78,8 +94,6 @@ struct ase_map_t
 	ase_uint_t factor;
 	ase_size_t threshold;
 	ase_map_pair_t** bucket;
-
-	void (*sameval) (void* owner, void* vptr, ase_size_t vlen);
 };
 
 enum ase_map_id_t
@@ -202,14 +216,23 @@ void ase_map_setcomper (
 	ase_map_comper_t comper
 );
 
-ase_sizer_t ase_map_getsizer (
+ase_map_keeper_t ase_map_getkeeper (
 	ase_map_t* map
 );
 
-/* the sizer function is called with a map object and map->capa + 1 */
+void ase_map_setkeeper (
+	ase_map_t* map,
+	ase_map_keeper_t keeper
+);
+
+ase_map_sizer_t ase_map_getsizer (
+	ase_map_t* map
+);
+
+/* the sizer function is passed a map object and map->capa + 1 */
 void ase_map_setsizer (
 	ase_map_t* map,
-	ase_sizer_t sizer
+	ase_map_sizer_t sizer
 );
 
 void* ase_map_getextension (
diff --git a/ase/include/ase/cmn/str.h b/ase/include/ase/cmn/str.h
index b686807c..e5521deb 100644
--- a/ase/include/ase/cmn/str.h
+++ b/ase/include/ase/cmn/str.h
@@ -1,5 +1,5 @@
 /*
- * $Id: str.h 372 2008-09-23 09:51:24Z baconevi $
+ * $Id: str.h 375 2008-09-23 14:47:23Z baconevi $
  *
  * {License}
  */
@@ -16,11 +16,12 @@
 #define ASE_STR_CHAR(x,idx) ((x)->ptr[idx])
 
 typedef struct ase_str_t ase_str_t;
+typedef ase_size_t (*ase_str_sizer_t) (ase_str_t* data, ase_size_t hint);
 
 struct ase_str_t
 {
 	ase_mmgr_t* mmgr;
-	ase_sizer_t sizer;
+	ase_str_sizer_t sizer;
 
 	ase_char_t* ptr;
 	ase_size_t  len;
@@ -225,7 +226,7 @@ int ase_str_yield (
  *
  * RETURNS: a sizer function set or ASE_NULL if no sizer is set.
  */
-ase_sizer_t ase_str_getsizer (
+ase_str_sizer_t ase_str_getsizer (
 	ase_str_t* str  /* a dynamic string */
 );
 
@@ -241,8 +242,8 @@ ase_sizer_t ase_str_getsizer (
  *  than the hint passed.
  */
 void ase_str_setsizer (
-	ase_str_t* str    /* a dynamic string */,
-	ase_sizer_t sizer /* a sizer function */
+	ase_str_t* str         /* a dynamic string */,
+	ase_str_sizer_t sizer /* a sizer function */
 );
 
 /*
diff --git a/ase/include/ase/types.h b/ase/include/ase/types.h
index 4b3b4c0c..ee1b593a 100644
--- a/ase/include/ase/types.h
+++ b/ase/include/ase/types.h
@@ -1,5 +1,5 @@
 /*
- * $Id: types.h 372 2008-09-23 09:51:24Z baconevi $
+ * $Id: types.h 375 2008-09-23 14:47:23Z baconevi $
  *
  * {License}
  */
@@ -359,14 +359,4 @@ struct ase_ccls_t
 	void* data;
 };
 
-
-/* 
- * NAME: determine the size of data
- *
- * DESCRIPTION:
- *  The ase_sizer_t is a generic type used by many other modules usually to
- *  get the new size for resizing data structure.
- */
-typedef ase_size_t (*ase_sizer_t) (void* data, ase_size_t hint);
-
 #endif
diff --git a/ase/lib/cmn/map.c b/ase/lib/cmn/map.c
index 4349e707..0198cf46 100644
--- a/ase/lib/cmn/map.c
+++ b/ase/lib/cmn/map.c
@@ -1,5 +1,5 @@
 /*
- * $Id: map.c 374 2008-09-23 11:37:38Z baconevi $
+ * $Id: map.c 375 2008-09-23 14:47:23Z baconevi $
  *
  * {License}
  */
@@ -13,6 +13,8 @@
 #define freeer_t ase_map_freeer_t
 #define hasher_t ase_map_hasher_t
 #define comper_t ase_map_comper_t
+#define keeper_t ase_map_keeper_t
+#define sizer_t  ase_map_sizer_t
 #define walker_t ase_map_walker_t
 
 #define KPTR(p)  ASE_MAP_KPTR(p)
@@ -132,9 +134,9 @@ static pair_t* change_pair_val (
 		/* if the old value and the new value are the same,
 		 * it just calls the handler for this condition. 
 		 * No value replacement occurs. */
-		if (map->sameval != ASE_NULL)
+		if (map->keeper != ASE_NULL)
 		{
-			map->sameval (map, vptr, vlen);
+			map->keeper (map, vptr, vlen);
 		}
 	}
 	else
@@ -319,12 +321,22 @@ void ase_map_setcomper (map_t* map, comper_t comper)
 	map->comper = comper;
 }
 
-ase_sizer_t ase_map_getsizer (map_t* map)
+keeper_t ase_map_getkeeper (map_t* map)
+{
+	return map->keeper;
+}
+
+void ase_map_setkeeper (map_t* map, keeper_t keeper)
+{
+	map->keeper = keeper;
+}
+
+sizer_t ase_map_getsizer (map_t* map)
 {
 	return map->sizer;
 }
 
-void ase_map_setsizer (map_t* map, ase_sizer_t sizer)
+void ase_map_setsizer (map_t* map, sizer_t sizer)
 {
 	map->sizer = sizer;
 }
diff --git a/ase/lib/cmn/str_dyn.c b/ase/lib/cmn/str_dyn.c
index a487bb0e..0a12df45 100644
--- a/ase/lib/cmn/str_dyn.c
+++ b/ase/lib/cmn/str_dyn.c
@@ -1,5 +1,5 @@
 /*
- * $Id: str_dyn.c 373 2008-09-23 11:27:24Z baconevi $
+ * $Id: str_dyn.c 375 2008-09-23 14:47:23Z baconevi $
  *
  * {License}
  */
@@ -82,12 +82,12 @@ int ase_str_yield (ase_str_t* str, ase_xstr_t* buf, int new_capa)
 	return 0;
 }
 
-ase_sizer_t ase_str_getsizer (ase_str_t* str)
+ase_str_sizer_t ase_str_getsizer (ase_str_t* str)
 {
 	return str->sizer;	
 }
 
-void ase_str_setsizer (ase_str_t* str, ase_sizer_t sizer)
+void ase_str_setsizer (ase_str_t* str, ase_str_sizer_t sizer)
 {
 	str->sizer = sizer;
 }