NIP-73: Add Wikidata identifiers #2150
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Summary
This pull request adds Wikidata support to NIP-73 External Content IDs.
It introduces the
wikidatakey for thektag.For the
itag value, standardized RDF prefixes officially used by Wikidata should be used:wd:Q...for entities (e.g.,wd:Q42)wdt:P...for properties (e.g.,wdt:P31)Application Example
Wikidata assigns IDs to virtually everything in the world. Combined with NIP-25, this allows reactions to "anything" to be recorded as Nostr events.
As a proof of concept, I created Thingstr: https://thingstr.pages.dev/
Note: Events generated by Thingstr currently use tags in ways not explicitly defined by NIPs yet. For compatibility reasons, they are currently sent only to my dedicated relay.
Concept Description
The original idea for Thingstr is described in my article from last year:
https://yakihonne.com/article/naddr1qvzqqqr4gupzqpuqfduxc63mgq9hkgxehly52q6l8tfp8kne0vx9p928vlpht32rqq255efedpr9snp3v4p564tgd4ury4n8fc6yx8asnpt
Additional Notes
The current Thingstr implementation also uses
l/Ltags in ways not currently defined in NIPs. I plan to propose a separate specification for those (potentially in NIP-32) in the future. This PR focuses solely on the Wikidata ID definition for NIP-73.