rdf_zlib_plugin.pl

/*  Part of SWI-Prolog

    Author:        Jan Wielemaker
    E-mail:        J.Wielemaker@vu.nl
    WWW:           http://www.swi-prolog.org
    Copyright (c)  2006-2011, University of Amsterdam
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*/

:- module(rdf_zlib_plugin, []).
:- use_module(library(zlib)).
:- use_module(library(semweb/rdf_db)).

/** <module> RDF compressed-data plugin

This  module  connects   library(zlib)    to   library(rdf_db),  causing
rdf_load/2 to seemlessly load .gz files.
*/

:- multifile
	rdf_db:rdf_open_decode/4,
	rdf_db:rdf_storage_encoding/2.

rdf_db:rdf_open_decode(gzip, File, Stream, close(Stream)) :-
	gzopen(File, read, Stream).

rdf_db:rdf_storage_encoding(gz, gzip).