@DanBri I would agree if this issue was not specifically about "alternatives to BlazeGraph" (RDF triplestore), with explicit requirements. Finding such alternative will already be difficult if not impossible, mostly due to the open-source requirement.

@So9q @AndreasKuczera @Versant.2612 why are you polluting the thread by suggesting projects/products that clearly do not meet the requirements? This includes Ontop, JanusGraph, TigerGraph, Neo4J etc.

I think the query examples should explicitly include even built-in WD prefixes such as wdt: and wikibase:. Missing prefixes render queries invalid and prevent people from simply copy-pasting them into their own environments.