Availability:
:- use_module(library(semweb/rdf_persistency)). rdf_db_to_file(?DB, 
?FileBase)
rdf_db_to_file(?DB, 
?FileBase).trp for the base state and .jrn for the 
journal.
:- use_module(library(semweb/rdf_persistency)). rdf_db_to_file(?DB, 
?FileBase)
rdf_db_to_file(?DB, 
?FileBase).trp for the base state and .jrn for the 
journal.