Well, reference documents vanishing from IBM site is no new news. This is what happened with the DBC Technical Reference Guide that was available on the IBM site till last year. I was looking for it a few days ago but couldn’t find it on the IBM site. I thought it was gone along with all the other developerworks articles.
But thanks to Cezar Tipa who had an offline copy and Biplab Das Choudhury who shared it on Linkedin a copy of it is still available.
I downloaded a copy and uploaded it here. You can find a link to the document below.