In files or string variables, and fully implements the functionality of apache's mod_include module.

it is an alternative to famous apache::ssi modules, but it doesn't require mod_perl. this is an advantage to those who are using public hosting services. there is a disadvantage, however - the module consumes much memory, and i don't recommend using it on heavy-loaded sites (currently it's being used on a site with 10000 hits, and i consider this as a limit). i hope to get rid of this disadvantage by the time the release comes out (currently it's beta).