Darts is simple C++ Template Library for implementation of Double-Array Structure.

A double-array structure is a kind of Trie structure, digital search tree, an efficient data structure combining fast access of a matrix form with the compactness of a list form. It is faster than other implementations like Hash tree, Patricia tree, Suffix Array and so.

For more detail about double-array structure, see "Aoe, J. An Efficient Digital Search Algorithm by Using a Double-Array Structure. IEEE Transactions on Software Engineering. Vol. 15, 9 (Sep 1989). pp. 1066-1077."

This software provides indexing operations for Common Prefix Search. Darts is used for MeCab and ChaSen, Japanese Morphological Analysis System.