diff --git a/include/xo/procedure2/DPrimitive.hpp b/include/xo/procedure2/DPrimitive.hpp
index 4331057..f602ebb 100644
--- a/include/xo/procedure2/DPrimitive.hpp
+++ b/include/xo/procedure2/DPrimitive.hpp
@@ -134,7 +134,7 @@ namespace xo {
             /** @defgroup scm-primitive-gcobject-facet **/
             ///@{
             std::size_t shallow_size() const noexcept;
-            Primitive * shallow_copy(obj<AAllocator> mm) const noexcept;
+            Primitive * shallow_move(obj<AAllocator> mm) const noexcept;
             std::size_t forward_children(obj<ACollector> gc) noexcept;
             ///@}
 
@@ -198,7 +198,7 @@ namespace xo {
 
         template <typename Fn>
         Primitive<Fn> *
-        Primitive<Fn>::shallow_copy(obj<AAllocator> mm) const noexcept {
+        Primitive<Fn>::shallow_move(obj<AAllocator> mm) const noexcept {
             void * mem = mm.alloc_copy((std::byte *)this);
 
             if (mem) {
diff --git a/include/xo/procedure2/detail/IGCObject_DPrimitive_gco_0.hpp b/include/xo/procedure2/detail/IGCObject_DPrimitive_gco_0.hpp
index 6660dad..cecc298 100644
--- a/include/xo/procedure2/detail/IGCObject_DPrimitive_gco_0.hpp
+++ b/include/xo/procedure2/detail/IGCObject_DPrimitive_gco_0.hpp
@@ -54,8 +54,8 @@ namespace xo {
             static size_type shallow_size(const DPrimitive_gco_0 & self) noexcept;
 
             // non-const methods
-            /** copy instance using allocator **/
-            static Opaque shallow_copy(DPrimitive_gco_0 & self, obj<AAllocator> mm) noexcept;
+            /** move instance using allocator **/
+            static Opaque shallow_move(DPrimitive_gco_0 & self, obj<AAllocator> mm) noexcept;
             /** during GC: forward immdiate children **/
             static size_type forward_children(DPrimitive_gco_0 & self, obj<ACollector> gc) noexcept;
             ///@}
diff --git a/include/xo/procedure2/detail/IGCObject_DPrimitive_gco_1_gco.hpp b/include/xo/procedure2/detail/IGCObject_DPrimitive_gco_1_gco.hpp
index a4aa56e..ac5c4f5 100644
--- a/include/xo/procedure2/detail/IGCObject_DPrimitive_gco_1_gco.hpp
+++ b/include/xo/procedure2/detail/IGCObject_DPrimitive_gco_1_gco.hpp
@@ -54,8 +54,8 @@ namespace xo {
             static size_type shallow_size(const DPrimitive_gco_1_gco & self) noexcept;
 
             // non-const methods
-            /** copy instance using allocator **/
-            static Opaque shallow_copy(DPrimitive_gco_1_gco & self, obj<AAllocator> mm) noexcept;
+            /** move instance using allocator **/
+            static Opaque shallow_move(DPrimitive_gco_1_gco & self, obj<AAllocator> mm) noexcept;
             /** during GC: forward immdiate children **/
             static size_type forward_children(DPrimitive_gco_1_gco & self, obj<ACollector> gc) noexcept;
             ///@}
diff --git a/include/xo/procedure2/detail/IGCObject_DPrimitive_gco_2_dict_string.hpp b/include/xo/procedure2/detail/IGCObject_DPrimitive_gco_2_dict_string.hpp
index a2e6e32..772aabb 100644
--- a/include/xo/procedure2/detail/IGCObject_DPrimitive_gco_2_dict_string.hpp
+++ b/include/xo/procedure2/detail/IGCObject_DPrimitive_gco_2_dict_string.hpp
@@ -54,8 +54,8 @@ namespace xo {
             static size_type shallow_size(const DPrimitive_gco_2_dict_string & self) noexcept;
 
             // non-const methods
-            /** copy instance using allocator **/
-            static Opaque shallow_copy(DPrimitive_gco_2_dict_string & self, obj<AAllocator> mm) noexcept;
+            /** move instance using allocator **/
+            static Opaque shallow_move(DPrimitive_gco_2_dict_string & self, obj<AAllocator> mm) noexcept;
             /** during GC: forward immdiate children **/
             static size_type forward_children(DPrimitive_gco_2_dict_string & self, obj<ACollector> gc) noexcept;
             ///@}
diff --git a/include/xo/procedure2/detail/IGCObject_DPrimitive_gco_2_gco_gco.hpp b/include/xo/procedure2/detail/IGCObject_DPrimitive_gco_2_gco_gco.hpp
index bad1200..266d1f4 100644
--- a/include/xo/procedure2/detail/IGCObject_DPrimitive_gco_2_gco_gco.hpp
+++ b/include/xo/procedure2/detail/IGCObject_DPrimitive_gco_2_gco_gco.hpp
@@ -54,8 +54,8 @@ namespace xo {
             static size_type shallow_size(const DPrimitive_gco_2_gco_gco & self) noexcept;
 
             // non-const methods
-            /** copy instance using allocator **/
-            static Opaque shallow_copy(DPrimitive_gco_2_gco_gco & self, obj<AAllocator> mm) noexcept;
+            /** move instance using allocator **/
+            static Opaque shallow_move(DPrimitive_gco_2_gco_gco & self, obj<AAllocator> mm) noexcept;
             /** during GC: forward immdiate children **/
             static size_type forward_children(DPrimitive_gco_2_gco_gco & self, obj<ACollector> gc) noexcept;
             ///@}
diff --git a/include/xo/procedure2/detail/IGCObject_DPrimitive_gco_3_dict_string_gco.hpp b/include/xo/procedure2/detail/IGCObject_DPrimitive_gco_3_dict_string_gco.hpp
index 6b5ddc3..7abc136 100644
--- a/include/xo/procedure2/detail/IGCObject_DPrimitive_gco_3_dict_string_gco.hpp
+++ b/include/xo/procedure2/detail/IGCObject_DPrimitive_gco_3_dict_string_gco.hpp
@@ -54,8 +54,8 @@ namespace xo {
             static size_type shallow_size(const DPrimitive_gco_3_dict_string_gco & self) noexcept;
 
             // non-const methods
-            /** copy instance using allocator **/
-            static Opaque shallow_copy(DPrimitive_gco_3_dict_string_gco & self, obj<AAllocator> mm) noexcept;
+            /** move instance using allocator **/
+            static Opaque shallow_move(DPrimitive_gco_3_dict_string_gco & self, obj<AAllocator> mm) noexcept;
             /** during GC: forward immdiate children **/
             static size_type forward_children(DPrimitive_gco_3_dict_string_gco & self, obj<ACollector> gc) noexcept;
             ///@}
diff --git a/src/procedure2/facet/IGCObject_DPrimitive_gco_0.cpp b/src/procedure2/facet/IGCObject_DPrimitive_gco_0.cpp
index 9e07858..948d1d6 100644
--- a/src/procedure2/facet/IGCObject_DPrimitive_gco_0.cpp
+++ b/src/procedure2/facet/IGCObject_DPrimitive_gco_0.cpp
@@ -22,9 +22,9 @@ namespace xo {
         }
 
         auto
-        IGCObject_DPrimitive_gco_0::shallow_copy(DPrimitive_gco_0 & self, obj<AAllocator> mm) noexcept -> Opaque
+        IGCObject_DPrimitive_gco_0::shallow_move(DPrimitive_gco_0 & self, obj<AAllocator> mm) noexcept -> Opaque
         {
-            return self.shallow_copy(mm);
+            return self.shallow_move(mm);
         }
         auto
         IGCObject_DPrimitive_gco_0::forward_children(DPrimitive_gco_0 & self, obj<ACollector> gc) noexcept -> size_type
diff --git a/src/procedure2/facet/IGCObject_DPrimitive_gco_1_gco.cpp b/src/procedure2/facet/IGCObject_DPrimitive_gco_1_gco.cpp
index b9a1b35..b5c1754 100644
--- a/src/procedure2/facet/IGCObject_DPrimitive_gco_1_gco.cpp
+++ b/src/procedure2/facet/IGCObject_DPrimitive_gco_1_gco.cpp
@@ -22,9 +22,9 @@ namespace xo {
         }
 
         auto
-        IGCObject_DPrimitive_gco_1_gco::shallow_copy(DPrimitive_gco_1_gco & self, obj<AAllocator> mm) noexcept -> Opaque
+        IGCObject_DPrimitive_gco_1_gco::shallow_move(DPrimitive_gco_1_gco & self, obj<AAllocator> mm) noexcept -> Opaque
         {
-            return self.shallow_copy(mm);
+            return self.shallow_move(mm);
         }
         auto
         IGCObject_DPrimitive_gco_1_gco::forward_children(DPrimitive_gco_1_gco & self, obj<ACollector> gc) noexcept -> size_type
diff --git a/src/procedure2/facet/IGCObject_DPrimitive_gco_2_dict_string.cpp b/src/procedure2/facet/IGCObject_DPrimitive_gco_2_dict_string.cpp
index 7bc9965..7c58550 100644
--- a/src/procedure2/facet/IGCObject_DPrimitive_gco_2_dict_string.cpp
+++ b/src/procedure2/facet/IGCObject_DPrimitive_gco_2_dict_string.cpp
@@ -22,9 +22,9 @@ namespace xo {
         }
 
         auto
-        IGCObject_DPrimitive_gco_2_dict_string::shallow_copy(DPrimitive_gco_2_dict_string & self, obj<AAllocator> mm) noexcept -> Opaque
+        IGCObject_DPrimitive_gco_2_dict_string::shallow_move(DPrimitive_gco_2_dict_string & self, obj<AAllocator> mm) noexcept -> Opaque
         {
-            return self.shallow_copy(mm);
+            return self.shallow_move(mm);
         }
         auto
         IGCObject_DPrimitive_gco_2_dict_string::forward_children(DPrimitive_gco_2_dict_string & self, obj<ACollector> gc) noexcept -> size_type
diff --git a/src/procedure2/facet/IGCObject_DPrimitive_gco_2_gco_gco.cpp b/src/procedure2/facet/IGCObject_DPrimitive_gco_2_gco_gco.cpp
index e770888..347295b 100644
--- a/src/procedure2/facet/IGCObject_DPrimitive_gco_2_gco_gco.cpp
+++ b/src/procedure2/facet/IGCObject_DPrimitive_gco_2_gco_gco.cpp
@@ -22,9 +22,9 @@ namespace xo {
         }
 
         auto
-        IGCObject_DPrimitive_gco_2_gco_gco::shallow_copy(DPrimitive_gco_2_gco_gco & self, obj<AAllocator> mm) noexcept -> Opaque
+        IGCObject_DPrimitive_gco_2_gco_gco::shallow_move(DPrimitive_gco_2_gco_gco & self, obj<AAllocator> mm) noexcept -> Opaque
         {
-            return self.shallow_copy(mm);
+            return self.shallow_move(mm);
         }
         auto
         IGCObject_DPrimitive_gco_2_gco_gco::forward_children(DPrimitive_gco_2_gco_gco & self, obj<ACollector> gc) noexcept -> size_type
diff --git a/src/procedure2/facet/IGCObject_DPrimitive_gco_3_dict_string_gco.cpp b/src/procedure2/facet/IGCObject_DPrimitive_gco_3_dict_string_gco.cpp
index f2dd967..26a9f3f 100644
--- a/src/procedure2/facet/IGCObject_DPrimitive_gco_3_dict_string_gco.cpp
+++ b/src/procedure2/facet/IGCObject_DPrimitive_gco_3_dict_string_gco.cpp
@@ -22,9 +22,9 @@ namespace xo {
         }
 
         auto
-        IGCObject_DPrimitive_gco_3_dict_string_gco::shallow_copy(DPrimitive_gco_3_dict_string_gco & self, obj<AAllocator> mm) noexcept -> Opaque
+        IGCObject_DPrimitive_gco_3_dict_string_gco::shallow_move(DPrimitive_gco_3_dict_string_gco & self, obj<AAllocator> mm) noexcept -> Opaque
         {
-            return self.shallow_copy(mm);
+            return self.shallow_move(mm);
         }
         auto
         IGCObject_DPrimitive_gco_3_dict_string_gco::forward_children(DPrimitive_gco_3_dict_string_gco & self, obj<ACollector> gc) noexcept -> size_type