1 files changed, 68 insertions, 0 deletions
diff --git a/www/wiki/extensions/SemanticMediaWiki/src/Exporter/ResourceBuilders/PreferredPropertyLabelResourceBuilder.php b/www/wiki/extensions/SemanticMediaWiki/src/Exporter/ResourceBuilders/PreferredPropertyLabelResourceBuilder.php
new file mode 100644
index 00000000..83c534bd
--- /dev/null
+++ b/www/wiki/extensions/SemanticMediaWiki/src/Exporter/ResourceBuilders/PreferredPropertyLabelResourceBuilder.php
@@ -0,0 +1,68 @@
+<?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
+			)
+		);
+	}
+
+}