Kevin Williams

Service Data Objects (SDOs) have become a foundation technology for Service Oriented Architecture (SOA). Recently, BEA, IBM, Oracle, SAP, Iona, Siebel, and Sybase announced their support for an SOA-enabling framework specification named Service Component Architecture (SCA). SD O provides the primary data representation in this framework. Although not addressed by the current SDO or SCA specifications, there's a definite need for a generic data access service that operates in terms of SDOs. The alternative to this service would be the tedious and error-prone development of a custom mapping between the back-end data representation and Service Data Objects. The Relational Database Data Access Service (RDB DAS) obviates the need for this custom development by providing a robust data access utility built around SDO. Because of its tight integration with SDO, the RDB DAS ... (more)

An Introduction to Service Data Objects

Late last year, IBM Corp., and BEA Systems, Inc., introduced Service Data Objects (SDO), a new data programming specification that complements existing Java 2 Enterprise Edition technologies and enables service-oriented architectures by providing uniform data access for a wide variety of service and resource types. Not only does SDO enable a consistent approach to data access, but it also provides features that simplify common application tasks, such as allowing data browsing and update while the application is disconnected from the data source. In this article we explain how SD... (more)