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Availability::- use_module(library(semweb/rdf11)).
[semidet]rdf_is_bnode(@Term)
True if Term is an RDF blank node identifier.

A blank node is represented by an atom that starts with _:.

Success of this goal does not imply that the blank node is present in the database (see rdf_bnode/1 for that).

For backwards compatibility, atoms that are represented with an atom that starts with __ are also considered to be a blank node.

Availability::- use_module(library(semweb/rdf_db)).
Sourcerdf_is_bnode(+Id)
Tests if a resource is a blank node (i.e. is an anonymous resource). A blank node is represented as an atom that starts with _:. For backward compatibility reason, __ is also considered to be a blank node.
See also
rdf_bnode/1.