[Animats]

Right. I was thinking "RDF - vaguely remember that as some XML thing from Semantic Web era".

Yup, it's still that RDF. Inevitably, it had to be converted to new JSON-like syntaxes.

It reminds me of the "is-a" predicate era of AI. That turned out to be not too useful for formal reasoning about the real world. As as a representation for SQL database output going into a LLM, though, it might go somewhere. Maybe.

Probably because the output of an SQL query is positional, and LLMs suck at positional representations.