RDF::Trine::Store::Hexastore - RDF store implemented with the hexastore index
This document describes RDF::Trine::Store::Hexastore version 1.002_01
use RDF::Trine::Store::Hexastore;
RDF::Trine::Store::Hexastore provides an in-memory triple-store based on six-way indexing as popularized by Hexastore.
Beyond the methods documented below, this class inherits methods from the RDF::Trine::Store class.
new ()
Returns a new storage object.
new_with_config ( $hashref )
Returns a new storage object configured with a hashref with certain keys as arguments.
The storetype key must be Hexastore for this backend.
storetype
Hexastore
This module also supports initializing the store from a file or URL, in which case, a sources key may be used. This holds an arrayref of hashrefs. To load a file, you may give the file name with a file key in the hashref, and to load a URL, use url. See example below. Furthermore, the following keys may be used:
sources
file
url
syntax
The syntax of the parsed file or URL.
base_uri
The base URI to be used for a parsed file.
The following example initializes a Hexastore store based on a local file and a remote URL:
my $store = RDF::Trine::Store->new_with_config( {storetype => 'Hexastore', sources => [ { file => 'test-23.ttl', syntax => 'turtle', }, { url => 'http://www.kjetil.kjernsmo.net/foaf', syntax => 'rdfxml', } ]});
store ( $filename )
Write the triples data to a file specified by $filename. This data may be read back in with the load method.
$filename
load
load ( $filename )
Returns a new Hexastore object with triples data from the specified file.
temporary_store
Returns a temporary (empty) triple store.
get_statements ($subject, $predicate, $object [, $context] )
Returns a stream object of all statements matching the specified subject, predicate and objects. Any of the arguments may be undef to match any value.
get_pattern ( $bgp [, $context] )
Returns a stream object of all bindings matching the specified graph pattern.
supports ( [ $feature ] )
If $feature is specified, returns true if the feature is supported by the store, false otherwise. If $feature is not specified, returns a list of supported features.
$feature
get_contexts
add_statement ( $statement [, $context] )
Adds the specified $statement to the underlying model.
$statement
remove_statement ( $statement [, $context])
Removes the specified $statement from the underlying model.
remove_statements ( $subject, $predicate, $object [, $context])
etag
Returns an Etag suitable for use in an HTTP Header.
nuke
Permanently removes all the data in the store.
count_statements ($subject, $predicate, $object)
Returns a count of all the statements matching the specified subject, predicate and objects. Any of the arguments may be undef to match any value.
Please report any bugs or feature requests to through the GitHub web interface at https://github.com/kasei/perlrdf/issues.
Gregory Todd Williams <gwilliams@cpan.org>
<gwilliams@cpan.org>
Copyright (c) 2006-2012 Gregory Todd Williams. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
To install RDF::Trine, copy and paste the appropriate command in to your terminal.
cpanm
cpanm RDF::Trine
CPAN shell
perl -MCPAN -e shell install RDF::Trine
For more information on module installation, please visit the detailed CPAN module installation guide.