Application Development Software

We want to share a UCM contribution 11g PS4 environment between the Intranet and Internet sites (the content may be rather different but all the infrastructure will be common), the consumption environment being different for the 2 sites. Having said that, if one of the 2 project requests a fix or version upgrade, to meet a requirement, there will be an issue of doing regression testing on both web sites.

What is the policy of Oracle concerning:
1) a mix of different versions between the contribution and consumption environment (for instance 11g PS5 on consumption and the forthcoming 11g PS5 on contribution).
2) a mix of different major versions (11g and the future 12g) between contribution and consumtion.
3) which of the environment, contribution or consumption, needs to be upgraded first.

Thanks to all for your comments,
Laurent LANDREAU
Solution architect