diff --git a/CMakeLists.txt b/CMakeLists.txt
index bb540b3..fc15ebf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -37,12 +37,26 @@ xo_add_genfacetimpl(
     OUTPUT_CPP_DIR src/object2
 )
 
+get_target_property(xo_printable2_src_dir xo-printable2 xo_srcdir)
+message(STATUS "xo_printable2_src_dir=${xo_printable_src_dir}")
+
+xo_add_genfacetimpl(
+    TARGET xo-object2-facetimpl-printable-float
+    FACET Printable
+    REPR Float
+    INPUT idl/IPrintable_DFloat.json5
+    OUTPUT_HPP_DIR include/xo/object2
+    OUTPUT_IMPL_SUBDIR .
+    OUTPUT_CPP_DIR src/object2
+)
+
 # ----------------------------------------------------------------
 
 # must complete definition of expression lib before configuring examples
 add_subdirectory(src/object2)
 add_subdirectory(utest)
-#xo_export_cmake_config(${PROJECT_NAME} ${PROJECT_VERSION} ${PROJECT_NAME}Targets)
+
+xo_export_cmake_config(${PROJECT_NAME} ${PROJECT_VERSION} ${PROJECT_NAME}Targets)
 
 # ----------------------------------------------------------------
 # docs targets depend on other library/utest/exec targets above,
diff --git a/idl/IPrintable_DFloat.json5 b/idl/IPrintable_DFloat.json5
new file mode 100644
index 0000000..31d10dd
--- /dev/null
+++ b/idl/IPrintable_DFloat.json5
@@ -0,0 +1,11 @@
+{
+    mode: "implementation",
+    includes: [],
+    namespace1: "xo",
+    namespace2: "print",
+    facet_idl: "idl/Printable.json5",
+    brief: "provide APrintable interface for DFloat",
+    using_doxygen: true,
+    repr: "DFloat",
+    doc: [ "doc for something or other" ],
+}
diff --git a/include/xo/object2/sequence/ISequence_Any.hpp b/include/xo/object2/sequence/ISequence_Any.hpp
index 06838b3..dc9d73f 100644
--- a/include/xo/object2/sequence/ISequence_Any.hpp
+++ b/include/xo/object2/sequence/ISequence_Any.hpp
@@ -66,7 +66,7 @@ namespace scm {
         ///@}
 
     private:
-        /** @defgraoup scm-sequence-any-private-methods **/
+        /** @defgroup scm-sequence-any-private-methods **/
         ///@{
 
         [[noreturn]] static void _fatal();
@@ -74,7 +74,7 @@ namespace scm {
         ///@}
 
     public:
-        /** @defgraoup scm-sequence-any-member-vars **/
+        /** @defgroup scm-sequence-any-member-vars **/
         ///@{
 
         static typeseq s_typeseq;
diff --git a/include/xo/object2/sequence/ISequence_Xfer.hpp b/include/xo/object2/sequence/ISequence_Xfer.hpp
index 4a679b6..3bcad3d 100644
--- a/include/xo/object2/sequence/ISequence_Xfer.hpp
+++ b/include/xo/object2/sequence/ISequence_Xfer.hpp
@@ -57,7 +57,7 @@ namespace scm {
         using I = Impl;
 
     public:
-        /** @defgraoup scm-sequence-xfer-member-vars **/
+        /** @defgroup scm-sequence-xfer-member-vars **/
         ///@{
 
         /** typeseq for template parameter DRepr **/
diff --git a/src/object2/CMakeLists.txt b/src/object2/CMakeLists.txt
index fc66c97..f1359f3 100644
--- a/src/object2/CMakeLists.txt
+++ b/src/object2/CMakeLists.txt
@@ -16,4 +16,3 @@ xo_add_shared_library4(${SELF_LIB} ${PROJECT_NAME}Targets ${PROJECT_VERSION} 1 $
 # note: deps here must also appear in cmake/xo_alloc2Config.cmake.in
 xo_dependency(${SELF_LIB} xo_gc)
 #xo_dependency(${SELF_LIB} indentlog)
-#add_dependencies(${SELF_LIB} xo-object2-facetimpl-sequence-list)