I'm still not clear about the discussion we had yesterday. @evan are AS2 (and #ActivityPub) serializations JSON-LD or not? I see the AS2 spec says the serialization only has "“compatibility with JSON-LD” but must conform to JSON-LD algorithm requirements. I understand if it's JSON-LD, it is also JSON (but not necessarily the inverse). Like we discussed yesterday, JSON-LD is JSON and it's an RDF data model. JSON, in general, is neither JSON-LD nor an RDF data model.