SIMPLE SOLUTIONS

RDF::TRINE::STORE::LANGUAGEPREFERENCE(3PM) - Linux man page online | Library functions

RDF Store proxy for filtering language tagged literals.

Chapter
2018-01-05
RDF::Trine::Store::LanguagePrefUsercContributed Perl DoRDF::Trine::Store::LanguagePreference(3pm)

NAME

RDF::Trine::Store::LanguagePreference - RDF Store proxy for filtering language tagged literals

VERSION

This document describes RDF::Trine::Store::LanguagePreference version 1.019

SYNOPSIS

use RDF::Trine::Store::LanguagePreference;

DESCRIPTION

RDF::Trine::Store::LanguagePreference provides a RDF::Trine::Store API to filter the statements made available from some underlying store object based on a users' language preferences (e.g. coming from an Accept-Language HTTP header value).

METHODS

Beyond the methods documented below, this class inherits methods from the RDF::Trine::Store class. "new ( $store, { $lang1 => $q1, $lang2 => $q2, ... } )" Returns a new storage object that will act as a proxy for the $store object, filtering language literals based on the expressed language preferences. "new_with_config ( $hashref )" Returns a new storage object configured with a hashref with certain keys as arguments. The "storetype" key must be "LanguagePreference" for this backend. The following key must also be used: "store" A configuration hash for the underlying store object. "preferred_languages" A hash reference mapping language tags to quality values in the range [0, 1]. The referent may be changed between operations to change the set of preferred languages used in statement matching. "new_with_config ( \%config )" Returns a new RDF::Trine::Store object based on the supplied configuration hashref. "language_preferences" Returns a hash of the language preference quality values. "language_preference( $lang )" Return the quality value preference for the given language. "update_language_preference( $lang => $qvalue )" Update the quality value preference for the given language. "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. "count_statements ( $subject, $predicate, $object, $context )" Returns a count of all the statements matching the specified subject, predicate, object, and context. Any of the arguments may be undef to match any value. "qvalueForLanguage ( $language, \%cache )" Returns the q-value for $language based on the current language preference. %cache is used across multiple calls to this method for performance reasons. "siteQValueForLanguage ( $language )" Returns an implementation-specific q-value preference for the given $language. This method may be overridden by subclasses to control the default preferred language. "availableLanguagesForStatement( $statement )" Returns a list of language tags that are available in the underlying store for the given statement object. For example, if $statement represented the triple: dbpedia:Los_Angeles rdf:label "Los Angeles"@en and the underlying store contains the triples: dbpedia:Los_Angeles rdf:label "Los Angeles"@en dbpedia:Los_Angeles rdf:label "ロサンゼルス"@ja dbpedia:Los_Angeles rdf:label "Лос-Анджелес"@ru then the return value would be "('en', 'ja', 'ru')". "languagePreferenceAllowsStatement ( $statement, \%cache )" Returns true if the $statement is allowed by the current language preference. %cache is used across multiple calls to this method for performance reasons. "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.

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 "<@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.
perl v5.26.1 2018-01-05 RDF::Trine::Store::LanguagePreference(3pm)
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