diff --git a/CMakeLists.txt b/CMakeLists.txt
index 31b408a..19a5936 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -64,6 +64,18 @@ xo_add_genfacetimpl(
     OUTPUT_CPP_DIR src/object2
 )
 
+# note: manual target; generated code committed to git
+xo_add_genfacetimpl(
+    TARGET xo-object2-facetimpl-printable-string
+    FACET_PKG xo_printable2
+    FACET Printable
+    REPR String
+    INPUT idl/IPrintable_DString.json5
+    OUTPUT_HPP_DIR include/xo/object2/string
+    OUTPUT_IMPL_SUBDIR .
+    OUTPUT_CPP_DIR src/object2
+)
+
 # note: manual target; generated code committed to git
 xo_add_genfacetimpl(
     TARGET xo-object2-facetimpl-gcobject-string
diff --git a/idl/IPrintable_DString.json5 b/idl/IPrintable_DString.json5
new file mode 100644
index 0000000..f032ca4
--- /dev/null
+++ b/idl/IPrintable_DString.json5
@@ -0,0 +1,13 @@
+{
+    mode: "implementation",
+    includes: [ "<xo/printable2/Printable.hpp>",
+                "<xo/printable2/detail/IPrintable_Xfer.hpp>" ],
+    local_types: [ ],
+    namespace1: "xo",
+    namespace2: "scm",
+    facet_idl: "idl/Printable.json5",
+    brief: "provide APrintable interface for DString",
+    using_doxygen: true,
+    repr: "DString",
+    doc: [ "implement APrintable for DString" ],
+}
diff --git a/include/xo/object2/string/IPrintable_DString.hpp b/include/xo/object2/string/IPrintable_DString.hpp
new file mode 100644
index 0000000..d1d3f22
--- /dev/null
+++ b/include/xo/object2/string/IPrintable_DString.hpp
@@ -0,0 +1,61 @@
+/** @file IPrintable_DString.hpp
+ *
+ *  Generated automagically from ingredients:
+ *  1. code generator:
+ *       [/home/roland/proj/xo-umbrella2-claude1/xo-facet/codegen/genfacet]
+ *     arguments:
+ *       --input [idl/IPrintable_DString.json5]
+ *  2. jinja2 template for abstract facet .hpp file:
+ *       [iface_facet_any.hpp.j2]
+ *  3. idl for facet methods
+ *       [idl/IPrintable_DString.json5]
+ **/
+
+#pragma once
+
+#include <xo/printable2/Printable.hpp>
+#include <xo/printable2/detail/IPrintable_Xfer.hpp>
+#include "DString.hpp"
+
+namespace xo { namespace scm { class IPrintable_DString; } }
+
+namespace xo {
+    namespace facet {
+        template <>
+        struct FacetImplementation<xo::print::APrintable,
+                                   xo::scm::DString>
+        {
+            using ImplType = xo::print::IPrintable_Xfer
+              <xo::scm::DString,
+               xo::scm::IPrintable_DString>;
+        };
+    }
+}
+
+namespace xo {
+    namespace scm {
+        /** @class IPrintable_DString
+         **/
+        class IPrintable_DString {
+        public:
+            /** @defgroup scm-printable-dstring-type-traits **/
+            ///@{
+            using ppindentinfo = xo::print::APrintable::ppindentinfo;
+            using Copaque = xo::print::APrintable::Copaque;
+            using Opaque = xo::print::APrintable::Opaque;
+            ///@}
+            /** @defgroup scm-printable-dstring-methods **/
+            ///@{
+            // const methods
+            /** Pretty-printing support for this object.
+See [xo-indentlog/xo/indentlog/pretty.hpp] **/
+            static bool pretty(const DString & self, const ppindentinfo & ppii);
+
+            // non-const methods
+            ///@}
+        };
+
+    } /*namespace scm*/
+} /*namespace xo*/
+
+/* end */
\ No newline at end of file
diff --git a/src/object2/CMakeLists.txt b/src/object2/CMakeLists.txt
index 4c74529..5764d98 100644
--- a/src/object2/CMakeLists.txt
+++ b/src/object2/CMakeLists.txt
@@ -11,6 +11,7 @@ set(SELF_SRCS
     IPrintable_DList.cpp
     IPrintable_DFloat.cpp
     IPrintable_DInteger.cpp
+    IPrintable_DString.cpp
     DList.cpp
     DFloat.cpp
     DInteger.cpp
diff --git a/src/object2/DInteger.cpp b/src/object2/DInteger.cpp
index 8e1b959..6c670cc 100644
--- a/src/object2/DInteger.cpp
+++ b/src/object2/DInteger.cpp
@@ -5,6 +5,7 @@
 
 #include "DInteger.hpp"
 #include <xo/indentlog/print/pretty.hpp>
+#include <xo/indentlog/scope.hpp>
 
 namespace xo {
     using xo::facet::typeseq;
diff --git a/src/object2/DList.cpp b/src/object2/DList.cpp
index b43d1a9..19e09e1 100644
--- a/src/object2/DList.cpp
+++ b/src/object2/DList.cpp
@@ -4,6 +4,8 @@
  **/
 
 #include "DList.hpp"
+#include "IPrintable_DList.hpp"
+#include <xo/gc/GCObject.hpp>
 #include <xo/printable2/Printable.hpp>
 #include <xo/facet/FacetRegistry.hpp>
 #include <xo/indentlog/print/pretty.hpp>
@@ -125,7 +127,9 @@ namespace xo {
                     obj<APrintable> elt
                         = FacetRegistry::instance().variant<APrintable, AGCObject>(l->head_);
 
-                    assert(elt);
+
+
+                    assert(elt.data());
 
                     if (!pps->print_upto(elt))
                         return false;
diff --git a/src/object2/DString.cpp b/src/object2/DString.cpp
index 3278d25..517f3f9 100644
--- a/src/object2/DString.cpp
+++ b/src/object2/DString.cpp
@@ -4,11 +4,13 @@
  **/
 
 #include "DString.hpp"
+#include <xo/indentlog/print/pretty.hpp>
 #include <algorithm>
 #include <cstring>
 
 namespace xo {
     using xo::facet::typeseq;
+    using xo::print::ppdetail_atomic;
 
     namespace scm {
         DString *
@@ -113,6 +115,12 @@ namespace xo {
             return shallow_size();
         }
 
+        bool
+        DString::pretty(const ppindentinfo & ppii) const
+        {
+            return ppdetail_atomic<const char *>::print_pretty(ppii, &(chars_[0]));
+        }
+
     } /*namespace scm*/
 } /*namespace xo*/
 
diff --git a/src/object2/IPrintable_DList.cpp b/src/object2/IPrintable_DList.cpp
index 19e5a87..bdcf669 100644
--- a/src/object2/IPrintable_DList.cpp
+++ b/src/object2/IPrintable_DList.cpp
@@ -12,6 +12,7 @@
 **/
 
 #include "IPrintable_DList.hpp"
+#include <xo/indentlog/scope.hpp>
 
 namespace xo {
     namespace scm {
diff --git a/src/object2/IPrintable_DString.cpp b/src/object2/IPrintable_DString.cpp
new file mode 100644
index 0000000..f47aa3f
--- /dev/null
+++ b/src/object2/IPrintable_DString.cpp
@@ -0,0 +1,28 @@
+/** @file IPrintable_DString.cpp
+ *
+ *  Generated automagically from ingredients:
+ *  1. code generator:
+ *       [/home/roland/proj/xo-umbrella2-claude1/xo-facet/codegen/genfacet]
+ *     arguments:
+ *       --input [idl/IPrintable_DString.json5]
+ *  2. jinja2 template for abstract facet .hpp file:
+ *       [iface_facet_any.hpp.j2]
+ *  3. idl for facet methods
+ *       [idl/IPrintable_DString.json5]
+**/
+
+#include "string/IPrintable_DString.hpp"
+
+namespace xo {
+    namespace scm {
+        auto
+        IPrintable_DString::pretty(const DString & self, const ppindentinfo & ppii) -> bool
+        {
+            return self.pretty(ppii);
+        }
+
+
+    } /*namespace scm*/
+} /*namespace xo*/
+
+/* end IPrintable_DString.cpp */
diff --git a/src/object2/object2_register_facets.cpp b/src/object2/object2_register_facets.cpp
index 8b9e810..9cf6798 100644
--- a/src/object2/object2_register_facets.cpp
+++ b/src/object2/object2_register_facets.cpp
@@ -13,6 +13,7 @@
 #include <xo/object2/IPrintable_DList.hpp>
 #include <xo/object2/IPrintable_DFloat.hpp>
 #include <xo/object2/IPrintable_DInteger.hpp>
+#include <xo/object2/string/IPrintable_DString.hpp>
 
 #include <xo/printable2/detail/APrintable.hpp>
 #include <xo/alloc2/alloc/AAllocator.hpp>
@@ -45,6 +46,7 @@ namespace xo {
             FacetRegistry::register_impl<APrintable, DInteger>();
 
             FacetRegistry::register_impl<AGCObject, DString>();
+            FacetRegistry::register_impl<APrintable, DString>();
 
             log && log(xtag("DList.tseq", typeseq::id<DList>()));
             log && log(xtag("DFloat.tseq", typeseq::id<DFloat>()));
diff --git a/utest/Printable.test.cpp b/utest/Printable.test.cpp
index 47bfcf1..c1b63dc 100644
--- a/utest/Printable.test.cpp
+++ b/utest/Printable.test.cpp
@@ -89,6 +89,8 @@ namespace ut {
         FacetRegistry::instance().dump(&std::cerr);
 
         for (std::size_t i_tc = 0, n_tc = s_testcase_v.size(); i_tc < n_tc; ++i_tc) {
+            log && log("printable1 test:", xtag("i_tc", i_tc));
+
             try {
                 const testcase_pp & tc = s_testcase_v[i_tc];
 
@@ -130,7 +132,7 @@ namespace ut {
 
                 pps.pretty(l0_po);
 
-                REQUIRE(ss.str() == string(tc.expected_));
+                CHECK(ss.str() == string(tc.expected_));
             } catch (std::exception & ex) {
                 std::cerr << "caught exception: " << ex.what() << std::endl;
                 REQUIRE(false);