I have installed Oracle SOA Suite 11g(126.96.36.199.0) in my system and working fine as of now.But now I want to install OSB on top of this, so can I install OSB or do I need to deinstall Oracle SOA Suite11g and then freshly install OSB first and then SOA Suite11g because as per the installation guide I have seen we need to install OSB first and after that SOA Suite.
Please advise me.
You can do it the other way around as well, even though OSB and then SOA Suiteis the preferred sequence. If you're not certain, you might wan't to put OSB in its own domain. For the rest, follow the installation instructions for OSB as provided by Oracle.