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@c -*-texinfo-*-
@c This is part of the GNU Guile Reference Manual.
-@c Copyright (C) 1996, 1997, 2000, 2001, 2002, 2003, 2004, 2011, 2012, 2013, 2014
+@c Copyright (C) 1996, 1997, 2000, 2001, 2002, 2003, 2004, 2011, 2012, 2013, 2014, 2020
@c Free Software Foundation, Inc.
@c See the file guile.texi for copying conditions.
@@ -378,13 +378,16 @@ is not specified.
@node Copying
@subsection Copying Deep Structures
-@c FIXME::martin: Review me!
-
The procedures for copying lists (@pxref{Lists}) only produce a flat
copy of the input list, and currently Guile does not even contain
-procedures for copying vectors. @code{copy-tree} can be used for these
-application, as it does not only copy the spine of a list, but also
-copies any pairs in the cars of the input lists.
+procedures for copying vectors. The @code{(ice-9 copy-tree)} module
+contains a @code{copy-tree} function that can be used for this purpose,
+as it does not only copy the spine of a list, but also copies any pairs
+in the cars of the input lists.
+
+@example
+(use-modules (ice-9 copy-tree))
+@end example
@deffn {Scheme Procedure} copy-tree obj
@deffnx {C Function} scm_copy_tree (obj)