- See also
- http://snowball.tartarus.org/
This module encapsulates "The C version of the libstemmer library"
from the Snowball project. This library provides stemmers in a variety
of languages. The interface to this library is very simple:
Here is an example:
?- snowball(english, walking, S).
S = walk.
- [det]snowball(+Algorithm,
+Input, -Stem)
- Apply the Snowball Algorithm on Input and unify
the result (an atom) with Stem.
The implementation maintains a cache of stemmers for each thread that
accesses snowball/3, providing
high-perfomance and thread-safety without locking.
| Algorithm | is the (english) name for desired
algorithm or an 2 or 3 letter ISO 639 language code. |
| Input | is the word to be stemmed. It is
either an atom, string or list of chars/codes. The library accepts
Unicode characters. Input must be
lowercase. See downcase_atom/2. |
- Errors
- -
domain_error(snowball_algorithm, Algorithm)
- type_error(atom, Algorithm)
- type_error(text, Input)
- [nondet]snowball_current_algorithm(?Algorithm)
- True if Algorithm is the official name of an algorithm
suported by snowball/3. The
predicate is
semidet if Algorithm is given.
