I've been working with a Bundle::Snapshot generated with CPAN's handy autobundle command. I'm running into a lot of modules in the inventory it produces that are in all lowercase... They have names like 'charnames', 'open', and 'vmsish' and seem to be core Perl modules...
Can someone explain to me what the all lowercase CPAN module name designates? Are these indeed core Perl modules that aren't CPAN modules in the same way that ThirdParty::Module style CPAN modules are?