rdf_compare/3

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Predicate rdf_compare/3

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Documentation
- Reference manual
- Packages
  - SWI-Prolog Semantic Web Library 3.0
    - Two RDF APIs
      - library(semweb/rdf11): The RDF database
        
        RDF literals
        
        rdf_canonical_literal/2
        
        rdf_lexical_form/2
        
        rdf_compare/3

Availability::- use_module(library(semweb/rdf11)).

Source

[det]rdf_compare(-Diff, +Left, +Right)

True if the RDF terms Left and Right are ordered according to the comparison operator Diff. The ordering is defines as:

Literal < BNode < IRI
For literals
- Numeric < non-numeric
- Numeric literals are ordered by value. If both are equal, floats are ordered before integers.
- Other data types are ordered lexicographically.
BNodes and IRIs are ordered lexicographically.

Note that this ordering is a complete ordering of RDF terms that is consistent with the partial ordering defined by SPARQL.

Diff is one of <, = or >