As you know, Blazegraph updater makes request to Special:EntityData and gets data of entity in RDF/Turtle formats.
One of prefixes is wdata which looks like:
@prefix wdata: <https://www.wikidata.org/wiki/Special:EntityData/> .
And Blazegraph updater expects it in this form (link to source):
public WikibaseUris(String host) {
root = "http://" + host;
rootHttps = "https://" + host;
entityData = root + "/wiki/Special:EntityData/";
entityDataHttps = rootHttps + "/wiki/Special:EntityData/";
....Problem is: Mediawiki core (Title->getCanonicalURL()) makes all links in content language which defined in $wgLanguageCode, and on site when (for example) $wgLanguageCode defined to 'ru', wdata prefix looks like:
@prefix wdata: <https://www.example.com/wiki/%D0%A1%D0%BB%D1%83%D0%B6%D0%B5%D0%B1%D0%BD%D0%B0%D1%8F:EntityData/> .
Point to WikibaseRepo.php source where the link is made ($entityDataTitle->getCanonicalURL()).
$entityDataTitle = Title::makeTitle( NS_SPECIAL, 'EntityData' ); $this->rdfVocabulary = new RdfVocabulary( $this->getVocabularyBaseUri(), $entityDataTitle->getCanonicalURL() . '/', $languageCodes, $this->dataTypeDefinitions->getRdfTypeUris() );
I think Special:EntityData should use English content language for making links, but I can't find easy and true way to do it.
Seems that this behavior is hard-coded in core and cannot be easy changed.