The Yankee Group said service-oriented architecture (SOA) is about to become a huge part of the data center. A new survey from the Boston-based research firm predicts <A HREF="http://searchwebservices.techtarget.com/originalContent/0,289142,sid26_gci1132774,00.html">widespread adoption of SOA in 2006,</A> but defining what exactly is being adopted is a problem. SOA is a collection of applications -- abstracted so they appear to be services