Thanks for starting this topic. Linked Data and Solid attracted my attention some time ago. I checked the NIPs and found some support built-in for this. NIP-32 defines how to apply labels or even RDF triples to events referring to an entity, there is a dedicated kind for this (1985) as well. In my opinion, this is a more structured approach for building ld apps on Nostr.
Did you know NIP-32? Looking forward to your opinion.