OMA Data Synchronization V2.0
This version is not backward compatible with the previous versions. And it is not based on SyncML Common specifications.

Three binding (HTTP binding, OBEX binding, WSP binding) documents are moved from SyncML Common 1.2.1 enabler to this enabler.

And three data object definition (Email, Folder, File) documents are moved out of this enabler and can be referred to DS 1.2.1 enabler.

Device Information: The device information DTD (Document Type Definition) is changed to XML Schema. The hierarchy of the device information is reorganized. Some new elements are added to indicate the optional features.

Protocols: Fingerprints are introduced to compare the data items before synchronization. New sync type negotiation parameters are introduced. Continuous sync is introduced to fulfill the real time synchronization requirements. The overall sync flows are redesigned.

Syntax: The representation protocol is changed to syntax, and DTD is changed to XML Schema. Source and Target related elements are redesigned to make it clearer which is Source and which is Target. Some DM (Device Mangement) related commands are removed or simplified. Some meta information related elements are combined into Syntax. For this release, the SyncML Common representation protocol and meta information protocol are not reused.

Management Object: A new document is introduced to use DS Management Object for provisioning parameters. Also, the corresponding supplement DDF document is introduced.

Notification:  Notification acknowledgement mechanism is introduced. A more generic notification framework is defined and new action types can be easily added.