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RDF::Trine::Store::LanUsereContributedRPF::Trine::Store::LanguagePreference(3)

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 "aa<micro>a^3a1/4a<<a^1"@ja
	    dbpedia:Los_Angeles	rdf:label "DhDh3/4N-DhDh1/2Dh'Dh<paragraph>Dh<micro>Dh>>Dh<micro>N"@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  "<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.

perl v5.32.1			  2018RDF::Trine::Store::LanguagePreference(3)

NAME | VERSION | SYNOPSIS | DESCRIPTION | METHODS | BUGS | AUTHOR | COPYRIGHT

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