Difference between jsf and jsf fragment

hi all,
now i am working with layout and menu framework.
our page have main menu and side menu then in the middle there is main area.
so far i use dynamic region and jsf fragment for main area.
because i can only use jsff in dynamic region. So when user click on main menu or side menu, i change dynamically in dynamic region.
So all of my functional pages become jsff.
is there any disadvantages for using like this?
is it anti design patterns?
With Regards,
WP

Hi,
I am having UI which includes 5 tabs.
The tabs present separate functionalities and are independent of each other.
I am not sure, whether to make 5 .jsff fragments and put them into one .jspx or make 5 different .jspx files.
Please comment on which approach to follow, or any general UI design guidelines to be looked into.
Thanks !

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