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<?php
namespace SMW\Exporter\ResourceBuilders;
use SMW\DataValueFactory;
use SMW\DIProperty;
use SMWDataItem as DataItem;
use SMWExpData as ExpData;
use SMWExpLiteral as ExpLiteral;
/**
* @private
*
* @license GNU GPL v2+
* @since 2.5
*
* @author mwjames
*/
class PreferredPropertyLabelResourceBuilder extends PropertyValueResourceBuilder {
/**
* @since 2.5
*
* {@inheritDoc}
*/
public function isResourceBuilderFor( DIProperty $property ) {
return $property->getKey() === '_PPLB';
}
/**
* @since 2.5
*
* {@inheritDoc}
*/
public function addResourceValue( ExpData $expData, DIProperty $property, DataItem $dataItem ) {
parent::addResourceValue( $expData, $property, $dataItem );
$dataValue = DataValueFactory::getInstance()->newDataValueByItem(
$dataItem,
$property
);
$list = $dataValue->toArray();
if ( !isset( $list['_TEXT'] ) || !isset( $list['_LCODE'] ) ) {
return;
}
// https://www.w3.org/TR/2009/NOTE-skos-primer-20090818/#secpref
//
// "skos:prefLabel ... implies that a resource can only have one such
// label per language tag ... it is recommended that no two concepts in
// the same KOS be given the same preferred lexical label for any given
// language tag ..."
$expData->addPropertyObjectValue(
$this->exporter->getSpecialNsResource( 'skos', 'prefLabel' ),
new ExpLiteral(
(string)$list['_TEXT'],
'http://www.w3.org/2001/XMLSchema#string',
(string)$list['_LCODE'],
$dataItem
)
);
}
}
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