Foreword

There are many successful case studies of SOA adoption, mainly in commercial enterprises. Part of what Gartner terms the "inperiod of enlightenment" related to hype cycles for emerging technology is the move from SOA as simply a set of technologies to service-orientation as a mindset for architecting, implementing and deploying services that add value to an organization. Regardless of this positive perception change, there are still two concerns from a maintenance and evolution perspective: (1) deployed service-oriented systems will have to be maintained and evolved and (2) legacy systems will continue to use service-orientation to make their legacy functionality available to other systems and applications.