The library(isub) implements a similarity measure between strings, i.e., something similar to the Levenshtein distance. This method is based on the length of common substrings.
- isub(+Text1:text, +Text2:text, +Normalize:bool, -Similarity:float) is det
- Similarity is a measure for the distance between Text1 and
?- isub('E56.Language', 'languange', true, D). D = 0.711348.
If Normalize is
true, isub/4 applies string normalization as implemented by the original authors: Text1 and Text2 are mapped to lowercase and the characters "._ " are removed. Lowercase mapping is done with the C-library function
towlower(). In general, the required normalization is domain dependent and is better left to the caller. See e.g., unaccent_atom/2.