allow `"@type": "@triple"` or something similar?

[pchampin]

The rationale is the following (adapted from this message):

{
    "@context": [
      "https://schema.org/",
      {
        "ex": "http://example.com/",
        "ex:captain": { "@type": "@id" }
      }
    ],
    "@type": "Event",
    "ex:realizationOf": { "@id": {
        "@id": "ex:bowls_club",
        "ex:captain": "ex:bob"
    }},
    "startDate": "01-01-2019",
    "endDate": "31-12-2019"
}

Since ex:realizationOf is always expecting a triple, we might want to be able to spare the intermediate "@id".

Of course, declaring ex:realizationOf as "@type": "@id" does not work, because this only affect values of the property that are strings. "@type": "@triple" seems like a natural way to do this, but it has the disadvantage or introducing a new keyword...

[gkellogg]

Could you spell out either how this would expand, and/or the equivalent Turtle-star? Presuming that blank nodes are used for the subject of the referenced triple, how does this work with compaction?

[pchampin]

In the value compaction algorithm, between 6.1 and 6.2, insert:

• Otherwise, if the type mapping of active property is set to @triple, and the value associated with the @id entry is an embedded node, set result to that embedded node.

It seems to me that it should do the trick?

[VladimirAlexiev]

@gkellogg Turtle-star is from https://lists.w3.org/Archives/Public/public-rdf-star/2021Dec/0063.html
(I'm unsure about schema prefix because there's no @vocab):

[a schema:Event;
  ex:realizationOf <<ex:bowls_club ex:captain ex:bob>>;
  schema:startDate "01-01-2019";
  endDate "31-12-2019"]

[gkellogg]

That is, in fact, the same as what my distiller generates:

@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix schema: <http://schema.org/> .

 [
    a schema:Event;
    <http://example.com/realizationOf> <<<http://example.com/bowls_club> <http://example.com/captain> <http://example.com/bob>>>;
    schema:endDate "31-12-2019"^^schema:Date;
    schema:startDate "01-01-2019"^^schema:Date
  ] .