Perl modules are not like dynamically loaded libraries in other programming languages. Thanks to the import function, sub prototypes, symbol table hacking, parser hooks, magic like Devel-Declare, ties and other voodoo, Perl modules can shape and craft the flavour of Perl that is available to their caller. A practical example: Perl's exception handling via eval and $@ is weird, clunky and error-prone. But by loading /users/toby_inkster/dsl/index.html