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- Some continuity with past
- human-readable metadata returned
- and machine-readable metadata returned
- including persistence statements
- who/what/when/where paradigm (ERC)
- THUMP-like request protocol -- ?info(X,Y) vs ?info&arg1=X&arg2=Y
- Never RDF
- unfortunately, JSON-LD is RDF; see tweet https://twitter.com/justin_littman/status/1206944465027584001
- however, widely used schema.org borrows elements names from JSON-LD and uses them in meta tags, which aren't at risk of RDF complexity
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