The section labels C<TYPEMAP>, C<INPUT>, or C<OUTPUT> must begin
in the first column on a line by themselves, and must be in uppercase.
-The default typemap in the C<ext> directory of the Perl source contains many
-useful types which can be used by Perl extensions. Some extensions define
-additional typemaps which they keep in their own directory. These
-additional typemaps may reference INPUT and OUTPUT maps in the main
+The default typemap in the C<lib/ExtUtils> directory of the Perl source
+contains many useful types which can be used by Perl extensions. Some
+extensions define additional typemaps which they keep in their own directory.
+These additional typemaps may reference INPUT and OUTPUT maps in the main
typemap. The B<xsubpp> compiler will allow the extension's own typemap to
override any mappings which are in the default typemap.