There are 2 major(4.x.x and 5.x.x) versions of JBoss Enterprise SOA Platform. I got these information from an article on redhat site (https://access.redhat.com/site/articles/111773).
I do not see versions prior to 4.2.0 on the download page for SOA platfrom.
SOA platfrom Download page : access.redhat.com/jbossnetwork/restricted/listSoftware.html?product=soaplatform&downloadType=distributions
In addtion to this, I have searched the press release page on redhat.com and it shows 4.2.0 as the first version. http://www.redhat.com/about/news/press-archive/2008/2/jboss-soa
I would like to know why the JBoss Enterprise SOA Platform version is started from 4.2.0?
If there are any prior versions before 4.2.0, why they are not downloadable from redhat.com download page?