Java Composite Application Platform Suite (or JCAPS) is Sun Microsystem software suite for service-oriented application architecture.
Java Composite Application Platform Suite (CAPS or JCAPS), is a standards-based extensible software suite from Sun Microsystems involved in the Open ESB initiative. It is used to develop software infrastructure when a service-oriented architecture approach has been adopted. Java CAPS is composed of several packages which help to integrate existing investments and deliver new business services in a SOA environment. As with other Java technologies, Java CAPS provides no specific vendor lock-in and supports a variety of operating systems.
Source: Wikipedia