package PerlIO;
+our $VERSION = '1.00';
+
# Map layer name to package that defines it
my %alias = (encoding => 'Encode');
Forces the use of C<perlio> layer even if the platform default, or
C<use open> default is something else (such as ":encoding(iso-8859-7)")
-which would interfere with binary nature of the stream.
+(the C<:encoding> requires C<use Encode>) which would interfere with
+binary nature of the stream.
=back