You can use the New Message Definition File wizard in the IBM® Integration Toolkit to import SCA import or SCA export components from WebSphere® Integration Developer. You must import an SCA import or SCA export into the workspace to provide an Integration Bus SCA definition for use in configuring the SCA nodes.
Service Component Architecture (SCA) is a specification that describes a model for building applications and systems using a service-oriented architecture (SOA).
For more information about SCA, see Service Component Architecture (SCA) overview