This package contains those Perl core modules that are architecture independent. See /usr/share/doc/perl/README.Debian for more information on the Perl Debian packaging. Please note that this package only exists to save archive space and should be considered an internal implementation detail of the `perl' package. Other packages should not depend on `perl-modules-5.xx' directly, they should use `perl' (which depends on `perl-modules-5.xx') instead. See Debian bug #552052 for background.