diff --git a/CMakeLists.txt b/CMakeLists.txt
index 556e6d6..31b408a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -71,8 +71,8 @@ xo_add_genfacetimpl(
     FACET GCObject
     REPR String
     INPUT idl/IGCObject_DString.json5
-    OUTPUT_HPP_DIR include/xo/object2
-    OUTPUT_IMPL_SUBDIR string
+    OUTPUT_HPP_DIR include/xo/object2/string
+    OUTPUT_IMPL_SUBDIR .
     OUTPUT_CPP_DIR src/object2
 )
 
diff --git a/idl/IGCObject_DString.json5 b/idl/IGCObject_DString.json5
index b8fcfba..8d0e14e 100644
--- a/idl/IGCObject_DString.json5
+++ b/idl/IGCObject_DString.json5
@@ -1,6 +1,7 @@
 {
     mode: "implementation",
-    includes: [ "<xo/gc/GCObject.hpp>",
+    includes: [
+        "<xo/gc/GCObject.hpp>",
         "<xo/alloc2/Allocator.hpp>"
     ],
     local_types: [ ],
diff --git a/include/xo/object2/IGCObject_DString.hpp b/include/xo/object2/string/IGCObject_DString.hpp
similarity index 100%
rename from include/xo/object2/IGCObject_DString.hpp
rename to include/xo/object2/string/IGCObject_DString.hpp
diff --git a/src/object2/IGCObject_DString.cpp b/src/object2/IGCObject_DString.cpp
index 72a8124..d411686 100644
--- a/src/object2/IGCObject_DString.cpp
+++ b/src/object2/IGCObject_DString.cpp
@@ -11,7 +11,7 @@
  *       [idl/IGCObject_DString.json5]
 **/
 
-#include "IGCObject_DString.hpp"
+#include "string/IGCObject_DString.hpp"
 
 namespace xo {
     namespace scm {
@@ -36,4 +36,4 @@ namespace xo {
     } /*namespace scm*/
 } /*namespace xo*/
 
-/* end IGCObject_DString.cpp */
\ No newline at end of file
+/* end IGCObject_DString.cpp */
diff --git a/src/object2/object2_register_facets.cpp b/src/object2/object2_register_facets.cpp
index c33b063..8b9e810 100644
--- a/src/object2/object2_register_facets.cpp
+++ b/src/object2/object2_register_facets.cpp
@@ -8,7 +8,7 @@
 #include <xo/object2/IGCObject_DList.hpp>
 #include <xo/object2/IGCObject_DFloat.hpp>
 #include <xo/object2/IGCObject_DInteger.hpp>
-#include <xo/object2/IGCObject_DString.hpp>
+#include <xo/object2/string/IGCObject_DString.hpp>
 
 #include <xo/object2/IPrintable_DList.hpp>
 #include <xo/object2/IPrintable_DFloat.hpp>
diff --git a/src/object2/object2_register_types.cpp b/src/object2/object2_register_types.cpp
index 909d28a..b8b6875 100644
--- a/src/object2/object2_register_types.cpp
+++ b/src/object2/object2_register_types.cpp
@@ -8,6 +8,7 @@
 #include "IGCObject_DList.hpp"
 #include "IGCObject_DFloat.hpp"
 #include "IGCObject_DInteger.hpp"
+#include "string/IGCObject_DString.hpp"
 
 #include "IPrintable_DList.hpp"
 //#include "IPrintable_DFloat.hpp"
@@ -17,12 +18,8 @@
 #include <xo/indentlog/scope.hpp>
 
 namespace xo {
-//    using xo::print::APrintable;
-//    using xo::mm::AAllocator;
     using xo::mm::ACollector;
     using xo::mm::AGCObject;
-//    using xo::mm::IGCObject_Any;
-//    using xo::facet::FacetRegistry;
     using xo::facet::impl_for;
     using xo::facet::typeseq;
     using xo::scope;
@@ -39,6 +36,10 @@ namespace xo {
 
             ok &= gc.install_type(impl_for<AGCObject, DFloat>());
 
+            ok &= gc.install_type(impl_for<AGCObject, DInteger>());
+
+            ok &= gc.install_type(impl_for<AGCObject, DString>());
+
             return ok;
         }
     }