rdf11:rdf_compare/3

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

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 >