| Christopher added a comment. |
A JSON-LD framing pipeline (like the one I have developed for Fedora Commons) is one use case. The JSON-LD library does not understand Skolem IRIs, so these type of identifier URIs would need to be converted into bnodes first. A Skolem IRI parsing function can be generic only if identifiers are recognizable in a standard namespace. Of course, one could hard code your namespaces into the parser as well, but this does not facilitate the interoperability of the data which is what is important and why there are recommendations like RFC5785.
Here is a basic gist of how an entity can be framed and it demonstrates the utility of JSON-LD framing for presentation tools.
http://json-ld.org/playground/#/gist/2e4059a897a90acd22d778267f230bd4
You may notice that this only includes the item graph and that the reference exists within its associated statement node, something that is rather cumbersome to resolve using the default RDF serialization formats.
I believe that it would benefit Wikibase and Wikidata to standardize the statement and reference identifiers not only as 128-bit UUIDs (which the current reference hash ID is not) but also as Skolem IRIs according to the W3C recommendation [1], (even if the immediate utility of a breaking change may not seem worthwhile).
Cc: Smalyshev, Aklapper, Christopher, EBjune, mschwarzer, merbst, Avner, debt, Gehel, D3r1ck01, Jonas, FloNight, Xmlizer, Izno, jkroll, Wikidata-bugs, Jdouglas, aude, Deskana, Manybubbles, Mbch331
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