diff --git a/ds/include/blue/ds/list.h b/ds/include/blue/ds/list.h
index 3e81d7c..8ed73a8 100644
--- a/ds/include/blue/ds/list.h
+++ b/ds/include/blue/ds/list.h
@@ -1,12 +1,20 @@
-#ifndef BLUE_OBJECT_LIST_H_
-#define BLUE_OBJECT_LIST_H_
+#ifndef BLUE_DS_LIST_H_
+#define BLUE_DS_LIST_H_
 
+#include <blue/core/macros.h>
 #include <blue/core/status.h>
-#include <blue/ds/object.h>
 
-#define B_LIST(p) ((b_list *)(p))
+B_DECLS_BEGIN;
+
+#define B_TYPE_LIST (b_list_get_type())
+
+struct b_list_p;
+
+B_DECLARE_TYPE(b_list);
+
+B_TYPE_CLASS_DECLARATION_BEGIN(b_list)
+B_TYPE_CLASS_DECLARATION_END(b_list)
 
-typedef struct b_list b_list;
 typedef struct b_list_entry b_list_entry;
 
 #define b_list_foreach(it, q)                                                  \
@@ -16,21 +24,16 @@ typedef struct b_list_entry b_list_entry;
 typedef struct b_list_iterator {
 	b_queue_iterator _base;
 	const b_list *_q;
+	const struct b_list_p *_q_p;
+
 	size_t i;
 	void *item;
 	b_list_entry *entry;
 } b_list_iterator;
 
-BLUE_API b_list *b_list_create(void);
+BLUE_API b_type b_list_get_type(void);
 
-static inline b_list *b_list_retain(b_list *str)
-{
-	return B_LIST(b_retain(B_DSREF(str)));
-}
-static inline void b_list_release(b_list *str)
-{
-	b_release(B_DSREF(str));
-}
+B_TYPE_DEFAULT_CONSTRUCTOR(b_list, B_TYPE_LIST);
 
 BLUE_API bool b_list_empty(b_list *q);
 BLUE_API void *b_list_first_item(const b_list *q);
@@ -64,4 +67,6 @@ BLUE_API bool b_list_iterator_is_valid(const b_list_iterator *it);
 
 BLUE_API void *b_list_entry_value(const b_list_entry *entry);
 
+B_DECLS_END;
+
 #endif
diff --git a/ds/list.c b/ds/list.c
index deeb2fb..3713ddc 100644
--- a/ds/list.c
+++ b/ds/list.c
@@ -1,36 +1,27 @@
-#include "list.h"
-
 #include <blue/ds/list.h>
 #include <stdlib.h>
 #include <string.h>
 
-static void list_release(struct b_dsref *obj);
+/*** PRIVATE DATA *************************************************************/
 
-static struct b_dsref_type list_type = {
-	.t_name = "corelib::list",
-	.t_flags = B_DSREF_FUNDAMENTAL,
-	.t_id = B_DSREF_TYPE_LIST,
-	.t_instance_size = sizeof(struct b_list),
-	.t_release = list_release,
+struct b_list_entry {
+	struct b_queue_entry e_entry;
+	void *e_data;
 };
 
-struct b_list *b_list_create(void)
-{
-	struct b_list *list
-		= (struct b_list *)b_dsref_type_instantiate(&list_type);
-	if (!list) {
-		return NULL;
-	}
+struct b_list_p {
+	struct b_queue l_queue;
+	size_t l_len;
+};
 
-	return list;
-}
+/*** PRIVATE FUNCTIONS ********************************************************/
 
-bool b_list_empty(struct b_list *q)
+static bool list_empty(struct b_list_p *q)
 {
 	return q->l_len == 0;
 }
 
-void *b_list_first_item(const struct b_list *q)
+static void *list_first_item(const struct b_list_p *q)
 {
 	struct b_queue_entry *entry = b_queue_first(&q->l_queue);
 
@@ -44,7 +35,7 @@ void *b_list_first_item(const struct b_list *q)
 	return list_entry->e_data;
 }
 
-void *b_list_last_item(const struct b_list *q)
+static void *list_last_item(const struct b_list_p *q)
 {
 	struct b_queue_entry *entry = b_queue_last(&q->l_queue);
 
@@ -58,7 +49,7 @@ void *b_list_last_item(const struct b_list *q)
 	return list_entry->e_data;
 }
 
-struct b_list_entry *b_list_first_entry(const struct b_list *q)
+static struct b_list_entry *list_first_entry(const struct b_list_p *q)
 {
 	struct b_queue_entry *entry = b_queue_first(&q->l_queue);
 
@@ -72,7 +63,7 @@ struct b_list_entry *b_list_first_entry(const struct b_list *q)
 	return list_entry;
 }
 
-struct b_list_entry *b_list_last_entry(const struct b_list *q)
+static struct b_list_entry *list_last_entry(const struct b_list_p *q)
 {
 	struct b_queue_entry *entry = b_queue_last(&q->l_queue);
 
@@ -86,6 +77,194 @@ struct b_list_entry *b_list_last_entry(const struct b_list *q)
 	return list_entry;
 }
 
+static size_t list_length(const struct b_list_p *q)
+{
+	return q->l_len;
+}
+
+static struct b_list_entry *make_entry(void *item)
+{
+	struct b_list_entry *entry = malloc(sizeof *entry);
+	if (!entry) {
+		return NULL;
+	}
+
+	memset(entry, 0x0, sizeof *entry);
+
+	entry->e_data = item;
+
+	return entry;
+}
+
+static struct b_list_entry *list_insert_before(
+	struct b_list_p *q, void *ptr, struct b_list_entry *before)
+{
+	struct b_list_entry *entry = make_entry(ptr);
+	if (!entry) {
+		return NULL;
+	}
+
+	b_queue_insert_before(&q->l_queue, &entry->e_entry, &before->e_entry);
+	q->l_len++;
+	return entry;
+}
+
+static struct b_list_entry *list_insert_after(
+	struct b_list_p *q, void *ptr, struct b_list_entry *after)
+{
+	struct b_list_entry *entry = make_entry(ptr);
+	if (!entry) {
+		return NULL;
+	}
+
+	b_queue_insert_after(&q->l_queue, &entry->e_entry, &after->e_entry);
+	q->l_len++;
+	return entry;
+}
+
+static struct b_list_entry *list_push_front(struct b_list_p *q, void *ptr)
+{
+	struct b_list_entry *entry = make_entry(ptr);
+	if (!entry) {
+		return NULL;
+	}
+
+	b_queue_push_front(&q->l_queue, &entry->e_entry);
+	q->l_len++;
+	return entry;
+}
+
+static struct b_list_entry *list_push_back(struct b_list_p *q, void *ptr)
+{
+	struct b_list_entry *entry = make_entry(ptr);
+	if (!entry) {
+		return NULL;
+	}
+
+	b_queue_push_back(&q->l_queue, &entry->e_entry);
+	q->l_len++;
+	return entry;
+}
+
+static void *list_pop_front(struct b_list_p *q)
+{
+	struct b_queue_entry *entry = b_queue_pop_front(&q->l_queue);
+	if (!entry) {
+		return NULL;
+	}
+
+	struct b_list_entry *list_entry
+		= b_unbox(struct b_list_entry, entry, e_entry);
+
+	void *item = list_entry->e_data;
+	free(list_entry);
+
+	q->l_len--;
+
+	return item;
+}
+
+static void *list_pop_back(struct b_list_p *q)
+{
+	struct b_queue_entry *entry = b_queue_pop_back(&q->l_queue);
+	if (!entry) {
+		return NULL;
+	}
+
+	struct b_list_entry *list_entry
+		= b_unbox(struct b_list_entry, entry, e_entry);
+
+	void *item = list_entry->e_data;
+	free(list_entry);
+
+	q->l_len--;
+
+	return item;
+}
+
+static struct b_list_entry *find_item(struct b_list_p *list, void *item)
+{
+	struct b_queue_iterator it;
+	b_queue_foreach (&it, &list->l_queue) {
+		struct b_list_entry *entry
+			= b_unbox(struct b_list_entry, it.entry, e_entry);
+
+		if (entry->e_data == item) {
+			return entry;
+		}
+	}
+
+	return NULL;
+}
+
+static b_status list_delete_item(struct b_list_p *q, void *ptr)
+{
+	struct b_list_entry *entry = find_item(q, ptr);
+	if (!entry) {
+		return B_ERR_NO_ENTRY;
+	}
+
+	b_queue_delete(&q->l_queue, &entry->e_entry);
+	q->l_len--;
+
+	free(entry);
+
+	return B_SUCCESS;
+}
+
+static b_status list_delete_entry(struct b_list_p *q, struct b_list_entry *entry)
+{
+	b_queue_delete(&q->l_queue, &entry->e_entry);
+	q->l_len--;
+
+	free(entry);
+
+	return B_SUCCESS;
+}
+
+static void list_delete_all(struct b_list_p *q)
+{
+	struct b_queue_iterator it;
+	b_queue_iterator_begin(&q->l_queue, &it);
+
+	while (b_queue_iterator_is_valid(&it)) {
+		struct b_list_entry *entry
+			= b_unbox(struct b_list_entry, it.entry, e_entry);
+		b_queue_iterator_erase(&it);
+
+		free(entry);
+	}
+
+	q->l_len = 0;
+}
+
+/*** PUBLIC FUNCTIONS *********************************************************/
+
+bool b_list_empty(b_list *q)
+{
+	B_CLASS_DISPATCH_STATIC_0(B_TYPE_LIST, list_empty, q);
+}
+
+void *b_list_first_item(const b_list *q)
+{
+	B_CLASS_DISPATCH_STATIC_0(B_TYPE_LIST, list_first_item, q);
+}
+
+void *b_list_last_item(const b_list *q)
+{
+	B_CLASS_DISPATCH_STATIC_0(B_TYPE_LIST, list_last_item, q);
+}
+
+struct b_list_entry *b_list_first_entry(const b_list *q)
+{
+	B_CLASS_DISPATCH_STATIC_0(B_TYPE_LIST, list_first_entry, q);
+}
+
+struct b_list_entry *b_list_last_entry(const b_list *q)
+{
+	B_CLASS_DISPATCH_STATIC_0(B_TYPE_LIST, b_list_last_entry, q);
+}
+
 struct b_list_entry *b_list_next(const struct b_list_entry *entry)
 {
 	if (!entry) {
@@ -116,171 +295,94 @@ struct b_list_entry *b_list_prev(const struct b_list_entry *entry)
 	return b_unbox(struct b_list_entry, next, e_entry);
 }
 
-size_t b_list_length(const struct b_list *q)
+size_t b_list_length(const b_list *q)
 {
-	return q->l_len;
-}
-
-static struct b_list_entry *make_entry(void *item)
-{
-	struct b_list_entry *entry = malloc(sizeof *entry);
-	if (!entry) {
-		return NULL;
-	}
-
-	memset(entry, 0x0, sizeof *entry);
-
-	entry->e_data = item;
-
-	return entry;
+	B_CLASS_DISPATCH_STATIC_0(B_TYPE_LIST, list_length, q);
 }
 
 struct b_list_entry *b_list_insert_before(
-	struct b_list *q, void *ptr, struct b_list_entry *before)
+	b_list *q, void *ptr, struct b_list_entry *before)
 {
-	struct b_list_entry *entry = make_entry(ptr);
-	if (!entry) {
-		return NULL;
-	}
-
-	b_queue_insert_before(&q->l_queue, &entry->e_entry, &before->e_entry);
-	q->l_len++;
-	return entry;
+	B_CLASS_DISPATCH_STATIC(B_TYPE_LIST, list_insert_before, q, ptr, before);
 }
 
 struct b_list_entry *b_list_insert_after(
-	struct b_list *q, void *ptr, struct b_list_entry *after)
+	b_list *q, void *ptr, struct b_list_entry *after)
 {
-	struct b_list_entry *entry = make_entry(ptr);
-	if (!entry) {
-		return NULL;
-	}
-
-	b_queue_insert_after(&q->l_queue, &entry->e_entry, &after->e_entry);
-	q->l_len++;
-	return entry;
+	B_CLASS_DISPATCH_STATIC(B_TYPE_LIST, list_insert_after, q, ptr, after);
 }
 
-struct b_list_entry *b_list_push_front(struct b_list *q, void *ptr)
+struct b_list_entry *b_list_push_front(b_list *q, void *ptr)
 {
-	struct b_list_entry *entry = make_entry(ptr);
-	if (!entry) {
-		return NULL;
-	}
-
-	b_queue_push_front(&q->l_queue, &entry->e_entry);
-	q->l_len++;
-	return entry;
+	B_CLASS_DISPATCH_STATIC(B_TYPE_LIST, list_push_front, q, ptr);
 }
 
-struct b_list_entry *b_list_push_back(struct b_list *q, void *ptr)
+struct b_list_entry *b_list_push_back(b_list *q, void *ptr)
 {
-	struct b_list_entry *entry = make_entry(ptr);
-	if (!entry) {
-		return NULL;
-	}
-
-	b_queue_push_back(&q->l_queue, &entry->e_entry);
-	q->l_len++;
-	return entry;
+	B_CLASS_DISPATCH_STATIC(B_TYPE_LIST, list_push_back, q, ptr);
 }
 
-void *b_list_pop_front(struct b_list *q)
+void *b_list_pop_front(b_list *q)
 {
-	struct b_queue_entry *entry = b_queue_pop_front(&q->l_queue);
-	if (!entry) {
-		return NULL;
-	}
-
-	struct b_list_entry *list_entry
-		= b_unbox(struct b_list_entry, entry, e_entry);
-
-	void *item = list_entry->e_data;
-	free(list_entry);
-
-	q->l_len--;
-
-	return item;
+	B_CLASS_DISPATCH_STATIC_0(B_TYPE_LIST, list_pop_front, q);
 }
 
-void *b_list_pop_back(struct b_list *q)
+void *b_list_pop_back(b_list *q)
 {
-	struct b_queue_entry *entry = b_queue_pop_back(&q->l_queue);
-	if (!entry) {
-		return NULL;
-	}
-
-	struct b_list_entry *list_entry
-		= b_unbox(struct b_list_entry, entry, e_entry);
-
-	void *item = list_entry->e_data;
-	free(list_entry);
-
-	q->l_len--;
-
-	return item;
+	B_CLASS_DISPATCH_STATIC_0(B_TYPE_LIST, list_pop_back, q);
 }
 
-static struct b_list_entry *find_item(struct b_list *list, void *item)
+b_status b_list_delete_item(b_list *q, void *ptr)
 {
-	struct b_queue_iterator it;
-	b_queue_foreach (&it, &list->l_queue) {
-		struct b_list_entry *entry
-			= b_unbox(struct b_list_entry, it.entry, e_entry);
-
-		if (entry->e_data == item) {
-			return entry;
-		}
-	}
-
-	return NULL;
+	B_CLASS_DISPATCH_STATIC(B_TYPE_LIST, list_delete_item, q, ptr);
 }
 
-b_status b_list_delete_item(struct b_list *q, void *ptr)
+b_status b_list_delete_entry(b_list *q, struct b_list_entry *entry)
 {
-	struct b_list_entry *entry = find_item(q, ptr);
-	if (!entry) {
-		return B_ERR_NO_ENTRY;
-	}
-
-	b_queue_delete(&q->l_queue, &entry->e_entry);
-	q->l_len--;
-
-	free(entry);
-
-	return B_SUCCESS;
+	B_CLASS_DISPATCH_STATIC(B_TYPE_LIST, list_delete_entry, q, entry);
 }
 
-b_status b_list_delete_entry(struct b_list *q, struct b_list_entry *entry)
+void b_list_delete_all(b_list *q)
 {
-	b_queue_delete(&q->l_queue, &entry->e_entry);
-	q->l_len--;
-
-	free(entry);
-
-	return B_SUCCESS;
+	B_CLASS_DISPATCH_STATIC_0(B_TYPE_LIST, list_delete_all, q);
 }
 
-void b_list_delete_all(struct b_list *q)
+/*** VIRTUAL FUNCTIONS ********************************************************/
+
+static void list_init(b_object *obj, void *priv)
 {
-	struct b_queue_iterator it;
-	b_queue_iterator_begin(&q->l_queue, &it);
-
-	while (b_queue_iterator_is_valid(&it)) {
-		struct b_list_entry *entry
-			= b_unbox(struct b_list_entry, it.entry, e_entry);
-		b_queue_iterator_erase(&it);
-
-		free(entry);
-	}
-
-	q->l_len = 0;
+	struct b_list_p *list = priv;
 }
 
-int b_list_iterator_begin(const struct b_list *q, struct b_list_iterator *it)
+static void list_fini(b_object *obj, void *priv)
+{
+	struct b_list_p *list = priv;
+	list_delete_all(list);
+}
+
+/*** CLASS DEFINITION *********************************************************/
+
+B_TYPE_CLASS_DEFINITION_BEGIN(b_list)
+	B_TYPE_CLASS_INTERFACE_BEGIN(b_object, B_TYPE_OBJECT)
+		B_INTERFACE_ENTRY(to_string) = NULL;
+	B_TYPE_CLASS_INTERFACE_END(b_object, B_TYPE_OBJECT)
+B_TYPE_CLASS_DEFINITION_END(b_list)
+
+B_TYPE_DEFINITION_BEGIN(b_list)
+	B_TYPE_ID(0x8730e66f, 0x0fd9, 0x4773, 0x9bbd, 0x6428f6e495eb);
+	B_TYPE_CLASS(b_list_class);
+	B_TYPE_INSTANCE_INIT(list_init);
+	B_TYPE_INSTANCE_INIT(list_fini);
+B_TYPE_DEFINITION_END(b_list)
+
+/*** ITERATOR FUNCTIONS *******************************************************/
+
+int b_list_iterator_begin(const b_list *q, struct b_list_iterator *it)
 {
-	b_queue_iterator_begin(&q->l_queue, &it->_base);
 	it->_q = q;
+	it->_q_p = b_object_get_private(q, B_TYPE_LIST);
+	b_queue_iterator_begin(&it->_q_p->l_queue, &it->_base);
+
 	it->i = 0;
 	it->entry = b_unbox(struct b_list_entry, it->_base.entry, e_entry);
 	if (it->entry) {
@@ -334,9 +436,3 @@ void *b_list_entry_value(const struct b_list_entry *entry)
 {
 	return entry ? entry->e_data : NULL;
 }
-
-static void list_release(struct b_dsref *obj)
-{
-	struct b_list *list = B_LIST(obj);
-	b_list_delete_all(list);
-}
diff --git a/ds/list.h b/ds/list.h
deleted file mode 100644
index fbea02a..0000000
--- a/ds/list.h
+++ /dev/null
@@ -1,19 +0,0 @@
-#ifndef _BLUELIB_LIST_H_
-#define _BLUELIB_LIST_H_
-
-#include "object.h"
-
-#include <blue/core/queue.h>
-
-struct b_list {
-	struct b_dsref l_base;
-	struct b_queue l_queue;
-	size_t l_len;
-};
-
-struct b_list_entry {
-	struct b_queue_entry e_entry;
-	void *e_data;
-};
-
-#endif