I'm planning to install Debian on my server. I would like to design the partitioning scheme in such a way, that I could install one or more other *nix distributives on that. So, reading many articles I think this scheme could be a good one for the initial idea of multi-boot:

/grub
/swap
/LVM VG1 (for OS1) ->
            /boot (LV1)
            /     (LV2)
            /tmp  (LV3)
            /var   ...
            /var/log
            /home
/LVM VG2 (for OS2) ->
            /boot
            /
            /tmp
            /var
            /var/log
            /home
... (other distros)
/LVM VG0 (for data) ->
            /data (LV1)

But I'm confused a little bit now: what should be the labels for these partitions (unique or not) and what should be the mounting points looking as (/home (OS1) mounted to /home as well as /home (OS2)...)?