rdf_find_literals(+Spec,
-ListOfLiterals)Find literals (without type or language specification) that satisfy
Spec. The required indices are created as needed and kept
up-to-date using hooks registered with rdf_monitor/2.
Numerical indexing is currently limited to integers in the range ±2^30
(±2^62 on 64-bit platforms). Spec is defined
as:
- and(Spec1, Spec2)
- Intersection of both specifications.
- or(Spec1, Spec2)
- Union of both specifications.
- not(Spec)
- Negation of Spec. After translation of the full specification
to
Disjunctive Normal Form (DNF), negations are only allowed
inside a conjunction with at least one positive literal.
- case(Word)
- Matches all literals containing the word Word, doing the
match case insensitive and after removing diacritics.
- stem(Like)
- Matches all literals containing at least one word that has the same stem
as Like using the Porter stem algorithm. See NLP package for
details.
- sounds(Like)
- Matches all literals containing at least one word that‘sounds like’
Like using the double metaphone algorithm. See NLP package
for details.
- prefix(Prefix)
- Matches all literals containing at least one word that starts with
Prefix, discarding diacritics and case.
- between(Low, High)
- Matches all literals containing an integer token in the range
Low..High, including the boundaries.
- ge(Low)
- Matches all literals containing an integer token with value
Low or higher.
- le(High)
- Matches all literals containing an integer token with value
High or lower.
- Token
- Matches all literals containing the given token. See tokenize_atom/2
of the NLP package for details.
