rdf_token_expansions/2

Documentation
- Reference manual
- Packages
  - SWI-Prolog Semantic Web Library 3.0
    - Plugin modules for rdf_db
      - library(semweb/rdf_litindex): Indexing words in literals
        
        rdf_find_literals/2
        
        rdf_token_expansions/2
        
        rdf_tokenize_literal/2
        
        Literal maps: Creating additional indices on literals

Availability::- use_module(library(semweb/rdf_litindex)).

rdf_token_expansions(+Spec, -Expansions)

Uses the same database as rdf_find_literals/2 to find possible expansions of Spec, i.e. which words‘sound like',‘have prefix', etc. Spec is a compound expression as in rdf_find_literals/2. Expansions is unified to a list of terms

sounds(Like, 
Words)

, stem(Like, Words) or

prefix(Prefix, 
Words)

. On compound expressions, only combinations that provide literals are returned. Below is an example after loading the ULAN^{2Unified
List of Artist Names from the Getty Foundation.} database and showing all words that sounds like‘rembrandt' and appear together in a literal with the word‘Rijn'. Finding this result from the 228,710 literals contained in ULAN requires 0.54 milliseconds (AMD 1600+).

?- rdf_token_expansions(and('Rijn', sounds(rembrandt)), L).

L = [sounds(rembrandt, ['Rambrandt', 'Reimbrant', 'Rembradt',
                        'Rembrand', 'Rembrandt', 'Rembrandtsz',
                        'Rembrant', 'Rembrants', 'Rijmbrand'])]

Here is another example, illustrating handling of diacritics:

?- rdf_token_expansions(case(cafe), L).

L = [case(cafe, [cafe, caf\'e])]