[vfaronov]

Outstanding explanation. I would like to emphasize one point:

> If you have multiple systems with data, and you want to merge the data together into a unified whole for some reason

This isn’t just about “big data” or “data warehousing” or such OLAPy concerns. It’s really about the bread and butter of modern information systems.

“Get some ID from service A, use it to query service B.” Does that sound familiar? That’s data integration for you. That’s what RDF / Linked Data is about.