DART

The "Distributed Archive of Random Transactions" is the consensus database used by tagion. It stores HiBON documents in a key value fashion. Where the key is a dartindex Each node continuously updates their copy of the database as consensus is reached.

Internally it is represented as a 'sparse-merkle-tree'. This allows efficiently calculating the consensus state of the database (bullseye).
And makes synchronization with new nodes trivial. The specific benefits of this structure is also described in the DART Patent.