This release adds the DCN merge command, which optimizes performance for certain applications, by merging an existing data graph within the SAP Mobile Server cache.
A graph represents a complete composite data tree instance starting from a single root data node, while a graph part represents one level within a graph. Sublevels are not included in graph parts. If you do not use the merge command, individual DCN commands first delete each graph part within the cache, then send individual commands to reconstruct the graph within the cache.
Documented in: Mobile Data Models: Using Mobile Business Objects > Merging a Composite Object Graph