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'''Service Data Objects''' is a technology that allows heterogeneous data to be accessed in a uniform way. The SDO specification was originally developed in 2004 as a joint collaboration between [[BEA]] and [[IBM]] and approved by the [[Java Community Process]]. Version 2.0 of the specification was introduced in November 2005 as key part of the [[Service component architecture | Service Component Architecture]].
==Design==
Service Data Objects denote the use of language-agnostic data structures that facilitate communication between structural tiers and various service-providing entities. They require the use of a [[tree structure]] with a [[root node]] and provide traversal mechanisms (breadth/depth-first) that allow client programs to navigate the elements. Objects can be static (fixed number of fields) or dynamic with a map-like structure allowing for unlimited fields. The specification defines [[meta-data]] for all fields and each object graph can also be provided with change summaries that can allow receiving programs to act more efficiently on them.
==Developers==
The specification is now being developed by:
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