here you can find an up to date and extensive list of module parameters that can be applied in some modules.

content_type_guid

tikipage

wiki pages.

tikibook

wiki books that contain a hierarchially structured list of wiki pages.

tikicomment

comments found troughout bitweaver

tikiuser

user information - also used to access users homepages.

fisheyegallery

image galleries created by fisheye

fisheyimage

image uploaded using the fisheye gallery

tikiblogpost

posts made to a blog.

show_date

anything

This is a boolean setting and will be active as soon as this parameter is not empty.