2.2.1.1 Nodes

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The NDB layer uses the concept of nodes to divide the data in the PST file into logical streams. A node is an abstraction that consists of a stream of bytes and a collection of subnodes. It is implemented by the NDB layer as a data block (section 2.2.2.8.3.1) and a subnode BTree (section 2.2.2.8.3.3). The NBTENTRY structures in the Node BTree (section 2.2.2.7.7.4) exist to define which blocks combine to form nodes.

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