# Perl Tags and Types
    ---
    - !Foo {private: tag}
    - !!perl/hash:Foo {}
    - !<tag:yaml.org,2002:perl/hash:Foo> {}
    ...
    %TAG ! !tag:ingy.net,2003:
    ---
    - !Foo {}  
    - !tag:ingy.net,2003:Foo {}