By Arnon Rotem-Gal-Oz, Eric Bruno, and Udi Dahan
Integration of services helps to achieve goals that are beyond the goals of a single service, for instance, the collaboration of several services to create a complete business process or creating a report on information from multiple services. This article based on chapter 7 of SOA Patterns takes a look at how to get an integrated view of the data needed for reporting when SOA encourages each service to hold its own data internally.

Aggregated Reporting (PDF)