Sent off to the CPAN, but in the meantime you can see docs over here. Hopefully, I'll finish adding proper support for RSS 1.0 modules soon. Speaking of which, the package generates RSS 1.0 by default because a) I like modules and b) there are already a wide variety of 1.0 -> 0.9x XSLT stylesheets available which can be easliy plugged into XML::Filter::XSLT.