Gregory Todd Williams > RDF-Trine > RDF::Trine::Store::Hexastore

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Module Version: 1.009   Source  

NAME ^

RDF::Trine::Store::Hexastore - RDF store implemented with the hexastore index

VERSION ^

This document describes RDF::Trine::Store::Hexastore version 1.009

SYNOPSIS ^

 use RDF::Trine::Store::Hexastore;

DESCRIPTION ^

RDF::Trine::Store::Hexastore provides an in-memory triple-store based on six-way indexing as popularized by Hexastore.

METHODS ^

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.

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:

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.

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.

get_contexts
add_statement ( $statement [, $context] )

Adds the specified $statement to the underlying model.

remove_statement ( $statement [, $context])

Removes the specified $statement from the underlying model.

remove_statements ( $subject, $predicate, $object [, $context])

Removes the specified $statement from the underlying model.

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.

BUGS ^

Please report any bugs or feature requests to through the GitHub web interface at https://github.com/kasei/perlrdf/issues.

AUTHOR ^

Gregory Todd Williams <gwilliams@cpan.org>

COPYRIGHT ^

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.

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