marisa-trie
MARISA: Matching Algorithm with Recursively Implemented StorAge
0.2.6
Matching Algorithm with Recursively Implemented StorAge (MARISA) is a static and space-efficient trie data structure. And libmarisa is a C++ library to provide an implementation of MARISA. Also, the package of libmarisa contains a set of command line tools for building and operating a MARISA-based dictionary.
A MARISA-based dictionary supports not only lookup but also reverse lookup, common prefix search and predictive search.
- Lookup is to check whether or not a given string exists in a dictionary.
- Reverse lookup is to restore a key from its ID.
- Common prefix search is to find keys from prefixes of a given string.
- Predictive search is to find keys starting with a given string.
The biggest advantage of libmarisa is that its dictionary size is considerably more compact than others. See below for the dictionary size of other implementations.
- Input
- Source: enwiki-20121101-all-titles-in-ns0.gz
- Contents: all page titles of English Wikipedia (Nov. 2012)
- Number of keys: 9,805,576
- Total size: 200,435,403 bytes (plain) / 54,933,690 bytes (gzipped)
| Implementation | Size (bytes) | Remarks |
|---|---|---|
| darts-clone | 376,613,888 | Compacted double-array trie |
| tx-trie | 127,727,058 | LOUDS-based trie |
| marisa-trie | 50,753,560 | MARISA trie |
- README (English): https://www.s-yata.jp/marisa-trie/docs/readme.en.html
- README (Japanese): https://www.s-yata.jp/marisa-trie/docs/readme.ja.html
You can get the latest version via git clone. Then, you can generate a configure script via autoreconf -i. After that, you can build and install libmarisa and its command line tools via configure and make. For details, see also documentation in docs.
$ git clone https://github.com/s-yata/marisa-trie.git
$ cd marisa-trie
$ autoreconf -i
$ ./configure --enable-native-code
$ make
$ make install
- The BSD 2-clause License
- The LGPL 2.1 or any later version