local deep linking the *proper* way?

[kentu]

i have a component called.... comp. it has many layers of sub pages that can be displayed. which are displayed are dictated by variables passed to it. what's the proper way to link from one sub page to another?

example:

index.php?option=com_comp&Itemid=25&task=blah

or

index.php?option=comp&task=blah

do i have to have the com_ in front of the component name? how about the Itemid, can i drop that?

thanks!!!