Apache Tuscany community is working to create a robust and easy to use infrastructure that simplifies the development of service-based application networks and addresses real business problems posed in SOA.

    *  Service Component Architecture (SCA) - An essential characteristic of SOA is the ability to assemble new and existing services to create brand new applications that may consist of different technologies. Service Component Architecture defines a simple, service-based model for construction, assembly and deployment of a network of services (existing and new ones) that are defined in a language-neutral way.

    * Service Data Objects (SDO) provides a uniform interface for handling different forms of data, including XML documents, that can exist in a network of services and provides the mechanism for tracking changes.

    * Data Access Service (DAS) provides a simple SDO interface to relational databases.

http://www.apache.org/dist/tuscany/java/sca/1.3.1/RELEASE_NOTES