2.3 LTP Layer

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The LTP layer builds on top of the NDB infrastructure to provide the structured storage elements that are required to represent complex messaging-related objects such as Folder objects, Message objects and Attachment objects.

The LTP defines a heap on an NDB node as well as a BTree that is defined within the heap structure.

The LTP uses these abstractions to further define property contexts and table contexts which represent collections of property-value pairs and tables consisting of rows of columns, respectively.

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