Ok. And the join strategy (i.e IDs alignment) between data sources is defined (declaratively? Programmatically?) in the "translation" layer. Sounds very intere

Ok. And the join strategy (i.e IDs alignment) between data sources is defined (declaratively? Programmatically?) in the "translation" layer. Sounds very interesting. I still think the URIs of the semantic web are a better idea, but given the fact that nobody (re)uses them, then why not a "translation" layer.